The following letter to Mr. Ticknor is in the same spirit as previous ones to Mr. Haldeman and others, concerning the distribution of fishes in America. It is given at the risk of some repet.i.tion, because it ill.u.s.trates Aga.s.siz's favorite idea that a key to the original combination of faunae in any given system of fresh waters, might be reached through a closer study than has yet been possible of the geographical or local circ.u.mscription of their inhabitants.

TO MR. GEORGE TICKNOR.

NAHANT, October 24, 1863.

MY DEAR SIR,

Among the schemes which I have devised for the improvement of the Museum, there is one for the realization of which I appeal to your aid and sympathy. Thus far the natural productions of the rivers and lakes of the world have not been compared with one another, except what I have done in comparing the fishes of the Danube with those of the Rhine and of the Rhone, and those of the great Canadian lakes with those of the Swiss lakes.

I now propose to resume this subject on the most extensive scale, since I see that it has the most direct bearing upon the trans.m.u.tation theory. . .First let me submit to you my plan.

Rivers and lakes are isolated by the land and sea from one another.

The question is, then, how they came to be peopled with inhabitants differing both from those on land and those in the sea, and how does it come that every hydrographic basin has its own inhabitants more or less different from those of any other basin? Take the Ganges, the Nile, and the Amazons. There is not a living being in the one alike to any one in the others, etc. Now to advance the investigation to the point where it may tell with reference to the scientific doctrines at present under discussion, it is essential to know the facts in detail, with reference to every fresh-water basin on earth. I have already taken means to obtain the tenants of all the rivers of Brazil, and partly of Russia, and I hope you may be able to put me in the way of getting those of Spain, if not of some other country beside. The plan I propose for that country would be worthy of the Doctors of Salamanca in her brightest days.

If this alone were carried out, it would be, I believe, sufficient to settle the whole question.

My idea is to obtain separate collections from all the princ.i.p.al rivers of Spain and Portugal, and even to have several separate collections from the larger rivers, one from their lower course, one from their middle course, and another from their head-waters.

Take, for instance, the Douro. One collection ought to be made at Oporto, and several higher up, among its various tributaries and in its upper course; say, one at Zamora and Valladolid, one at Salamanca from the Tormes River, one at Leon from the Esla River, one at Burgos and Palencia from the northern tributaries, one at Soria and Segovia from the southern tributaries. If this could be done on such a scale as I propose, it would in itself be a work worthy of the Spanish government, and most creditable to any man who should undertake it. The fact is that nothing of the kind has ever been done yet anywhere. A single collection from the Minho would be sufficient, say from Orense or Melgaco. From the northern rivers along the gulf of Biscay all that would be necessary would be one thoroughly complete collection from one of the little rivers that come down from the mountains of Asturias, say from Oviedo.

The Ebro would require a more elaborate survey. From its upper course, one collection would be needed from Haro or Frias or Miranda; another from Saragossa, and one from its mouth, including the minnows common among the brackish waters near the mouth of large rivers. In addition to this, one or two of the tributaries of the Ebro, coming down from the Pyrenees, should be explored in the same manner; say one collection from Pampeluna, and one from Urgel, or any other place on the southern slope of the Pyrenees. A collection made at Barcelona from the river and the brackish marshes would be equally desirable; another from the river at Valencia, and, if possible, also from its head-waters at Ternel; another from the river Segura at Murcia, and somewhere in the mountains from its head-waters. Granada would afford particular interest as showing what its mountain streams feed. A collection from the Almeria River at Almeria, or from any of the small rivers of the southern coast of Spain, would do; and it would be the more interesting if another from the river Xenil could be obtained at or near Granada, to compare with the inhabitants of the waters upon the southern slope of the Sierra Nevada.

Next would come the Guadalquivir, from which a collection should be made at San Lucar, with the brackish water species; another at Seville or Cordova, one among the head-waters from the Sierra Nevada, and another from the mountains of the Mancha. From the Guadiana a collection from Villa Real, with the brackish species; one from Badajoz, and one from the easternmost headwaters, and about where the river is lost under ground.

The Tagus would again require an extensive exploration. In the first place a thorough collection of all the species found in the great estuary ought to be made with the view of ascertaining how far marine Atlantic species penetrate into the river basin; then one from Santarem, and another either from Talavera or Toledo or Aranjuez, and one from the head-waters in Guadalaxara, and another in Molina.

The collections made at different stations ought carefully to be kept in distinct jars or kegs, with labels so secure that no confusion or mistake can arise. But the specimens collected at the same station may be put together in the same jar. These collections require, in fact, very little care. (Here some details about mode of putting up specimens, transportation, etc.) If the same person should collect upon different stations, either in the same or in different hydrographic basins, the similarity of the specimens should not be a reason for neglecting to preserve them. What is aimed at is not to secure a variety of species, but to learn in what localities the same species may occur again and again, and what are the localities which nourish different species, no matter whether these species are in themselves interesting or not, new to science or known for ages, whether valuable for the table or unfit to eat. The mere fact of their distribution is the point to be ascertained, and this, as you see, requires the most extensive collections, affording in themselves comparatively little interest, but likely to lead, by a proper discussion of the facts, to the most unexpected philosophical results. . .Do, please, what you can in this matter. Spain alone might give us the materials to solve the question of trans.m.u.tation versus creation. I am going to make a similar appeal to my friends in Russia for materials from that country, including Siberia and Kamschatka. Our own rivers are not easily accessible now.

Ever truly your friend,

L. AGa.s.sIZ.

CHAPTER 20.

1863-1864: AGE 56-57.

Correspondence with Dr. S.G. Howe.

Bearing of the War on the Position of the Negro Race.

Affection for Harvard College.

Interest in her General Progress.

Correspondence with Emerson concerning Harvard.

Glacial Phenomena in Maine.

AGa.s.sIZ'S letters give little idea of the deep interest he felt in the war between North and South, and its probable issue with reference to the general policy of the nation, and especially to the relation between the black and white races. Although any judgment upon the accuracy of its conclusions would now be premature, the following correspondence between Aga.s.siz and Dr. S.

G. Howe is nevertheless worth considering, as showing how the problem presented itself to the philanthropist and the naturalist from their different stand-points.

FROM DR. S.G. HOWE.

PORTSMOUTH, August 3, 1863.

MY DEAR AGa.s.sIZ,

You will learn by a glance at the inclosed circular the object of the commission of which I am a member.

The more I consider the subject to be examined and reported upon, the more I am impressed by its vastness; the more I see that its proper treatment requires a consideration of political, physiological, and ethnological principles. Before deciding upon any political policy, it is necessary to decide several important questions, which require more knowledge for their solution than I possess.

Among these questions, this one occupies me most now. Is it probable that the African race, represented by less than two million blacks and a little more than two million mulattoes, unrecruited by immigration, will be a persistent race in this country? or will it be absorbed, diluted, and finally effaced by the white race, numbering twenty-four millions, and continually increased by immigration, beside natural causes.

Will not the general practical amalgamation fostered by slavery become more general after its abolition? If so, will not the proportion of mulattoes become greater and that of the pure blacks less? With an increase and final numerical prevalence of mulattoes the question of the fertility of the latter becomes a very important element in the calculation. Can it be a persistent race here where pure blacks are represented by 2, and the whites by 20-24?

Is it not true that in the Northern States at least the mulatto is unfertile, leaving but few children, and those mainly lymphatic and scrofulous?

In those sections where the blacks and mulattoes together make from seventy to eighty and even ninety per cent of the whole population will there be, after the abolition of slavery, a sufficiently large influx of whites to counteract the present numerical preponderance of blacks?

It looks now as if the whites would EXPLOITER the labors of the blacks, and that social servitude will continue long in spite of political equality.

You will see the importance of considering carefully the natural laws of increase and their modification by existing causes before deciding upon any line of policy.

If there be irresistible natural tendencies to the growth of a persistent black race in the Gulf and river States, we must not make bad worse by futile attempts to resist it. If, on the other hand, the natural tendencies are to the diffusion and final disappearance of the black (and colored) race, then our policy should be modified accordingly.

I should be very glad, my dear sir, if you could give me your views upon this and cognate matters. If, however, your occupations will not permit you to give time to this matter, perhaps you will a.s.sist me by pointing to works calculated to throw light upon the subject of my inquiry, or by putting me in correspondence with persons who have the ability and the leisure to write about it.

I remain, dear sir, faithfully,

SAMUEL G. HOWE.

TO DR. S.G. HOWE.

NAHANT, August 9, 1863.

MY DEAR DOCTOR,

When I acknowledged a few days ago the receipt of your invitation to put in writing my views upon the management of the negro race as part of the free population of the United States, I stated to you that there was a preliminary question of the utmost importance to be examined first, since whatever convictions may be formed upon that point must necessarily influence everything else relating to the subject. The question is simply this: Is there to be a permanent black population upon the continent after slavery is everywhere abolished and no inducement remains to foster its increase? Should this question be answered in the negative, it is evident that a wise policy would look to the best mode of removing that race from these States, by the encouragement and acceleration of emigration. Should the question be answered, on the contrary, in the affirmative, then it is plain that we have before us one of the most difficult problems, upon the solution of which the welfare of our own race may in a measure depend, namely, the combination in one social organization of two races more widely different from one another than all the other races. In effecting this combination it becomes our duty to avoid the recurrence of great evils, one of which is already foreshadowed in the advantage which unscrupulous managers are taking of the freedmen, whenever the latter are brought into contact with new social relations.

I will, for the present, consider only the case of the unmixed negroes of the Southern States, the number of which I suppose to be about two millions. It is certainly not less,--it may be a little more. From whatever point of view you look upon these people you must come to the conclusion that, left to themselves, they will perpetuate their race ad infinitum where they are. According to the prevalent theory of the unity of mankind it is a.s.sumed that the different races have become what they are in consequence of their settlement in different parts of the world, and that the whole globe is everywhere a fit abode for human beings who adapt themselves to the conditions under which they live. According to the theory of a multiple origin of mankind the different races have first appeared in various parts of the globe, each with the peculiarities best suited to their primitive home. Aside from these theoretical views the fact is, that some races inhabit very extensive tracts of the earth's surface, and are now found upon separate continents, while others are very limited in their range.

This distribution is such that there is no reason for supposing that the negro is less fitted permanently to occupy at least the warmer parts of North and South America, than is the white race to retain possession of their more temperate portions. a.s.suming our pure black race to be only two millions, it is yet larger than the whole number of several races that have held uninterrupted possession of different parts of the globe ever since they have been known to the white race. Thus the Hottentots and the Abyssinians have maintained themselves in their respective homes without change ever since their existence has been known to us, even though their number is less than that of our pure black population. The same, also, is the case with the population of Australia and of the Pacific islands. The Papuan race, the Negrillo race, the Australian race proper, distinct from one another, as well as from all other inhabitants of the earth, number each fewer inhabitants than already exist of the negro race in the United States alone, not to speak of Central and South America.

This being the case there is, it seems to me, no more reason to expect a disappearance of the negro race from the continent of America without violent interference, than to expect a disappearance of the races inhabiting respectively the South Sea Islands, Australia, the Cape of Good Hope, or any other part of the globe tenanted by the less populous races. The case of the American Indians, who gradually disappear before the white race, should not mislead us, as it is readily accounted for by the peculiar character of that race. The negro exhibits by nature a pliability, a readiness to accommodate himself to circ.u.mstances, a p.r.o.neness to imitate those among whom he lives,--characteristics which are entirely foreign to the Indian, while they facilitate in every way the increase of the negro. I infer, therefore, from all these circ.u.mstances that the negro race must be considered as permanently settled upon this continent, no less firmly than the white race, and that it is our duty to look upon them as co-tenants in the possession of this part of the world.

Remember that I have thus far presented the case only with reference to the Southern States, where the climate is particularly favorable to the maintenance and multiplication of the negro race.

Before drawing any inference, however, from my first a.s.sertion that the negro will easily and without foreign a.s.sistance maintain himself and multiply in the warmer parts of this continent, let us consider a few other features of this momentous question of race.

Whites and blacks may multiply together, but their offspring is never either white or black; it is always mulatto. It is a half-breed, and shares all the peculiarities of half-breeds, among whose most important characteristics is their sterility, or at least their reduced fecundity. This shows the connection to be contrary to the normal state of the races, as it is contrary to the preservation of species in the animal kingdom. . .Far from presenting to me a natural solution of our difficulties, the idea of amalgamation is most repugnant to my feelings. It is now the foundation of some of the most ill-advised schemes. But wherever it is practiced, amalgamation among different races produces shades of population, the social position of which can never be regular and settled. From a physiological point of view, it is sound policy to put every possible obstacle to the crossing of the races, and the increase of half-breeds. It is unnatural, as shown by their very const.i.tution, their sickly physique, and their impaired fecundity.

It is immoral and destructive of social equality as it creates unnatural relations and multiplies the differences among members of the same community in a wrong direction.

From all this it is plain that the policy to be adopted toward the miscellaneous colored population with reference to a more or less distant future should be totally different from that which applies to the pure black; for while I believe that a wise social economy will foster the progress of every pure race, according to its natural dispositions and abilities, and aim at securing for it a proper field for the fullest development of all its capabilities, I am convinced also that no efforts should be spared to check that which is inconsistent with the progress of a higher civilization and a purer morality. I hope and trust that as soon as the condition of the negro in the warmer parts of our States has been regulated according to the laws of freedom, the colored population in the more northern parts of the country will diminish. By a natural consequence of unconquerable affinities, the colored people in whom the negro nature prevails will tend toward the South, while the weaker and lighter ones will remain and die out among us.

Entertaining these views upon the fundamental questions concerning the races, the next point for consideration is the policy to be adopted under present circ.u.mstances, in order to increase the amount of good which is within our grasp and lessen the evil which we may avert. This will be for another letter.

Very truly yours,