Permanent camp was made in the cabin of the dirigible. In arranging this all the machinery, the engine, the blower, the dynamo, the reconverter and the aeroplanes, the rudder and the propeller were unmounted, and the smaller articles made ready for storing in the temple entrance. There were four casks of gasoline left unused. As these were being carried to the temple Ned suddenly exclaimed:

"Why not rig up the engine and dynamo and use an electric light down in our cave of Mystery."

"Good," answered Alan, "and while we are at it, why not hook up the balloonet blower with the engine and get fresh air?"

The stowing away of the machinery, the packing of the gas bag and the setting up of the engine and dynamo and blower afforded plenty of work until noon; and then, while the trusty little engine was pumping volumes of good sweet air into the hot, almost suffocating chamber below ground, the boys had luncheon.

Then began the real exhumation of the long buried articles in the secret religious chamber of the almost forgotten race. As revelation succeeded revelation in the next two days the paralyzing wonder that first came to Ned and Alan was succeeded by the dullness of fatigue. At intervals of not more than an hour they came above ground for fresh air. The absence of water soon converted them into bronze-like human statues. They could feel that their lungs were becoming clogged with the almost impalpable dust. But they persevered. The prize was too rich to be abandoned because of mere physical discomfort.

By means of the wired drag rope the powerful incandescent light was carried to all the chambers. And one after another, as the blower gave the boys air and helped sweep away the clouds of dust, the remains which had lain buried for over three centuries were uncovered and brought above ground.

Of the pottery itself, vases, jars, and religious ceremonial utensils, perfect in shape and displaying ornamentation that would have delighted Major Honeywell, the excavators could take little note. After removing the twelve gold hoops or bands from the supporting columns and twenty similar silver rings from the second row of pillars, the boys penetrated the elevation in the center of the "khiva."

As the end of the blower pipe was directed against this square column, the sediment of centuries disappeared. Then the brilliantly penetrating glare of the reflected electric light fell on the elevation and both boys burst out in an exclamation of amazement.

On what had been a ceremonial dais stood the treasure of the secret city of Cibola--an image of the sacred Golden Eagle of the Aztecs.

The revered bird of the Aztecs stood upright, its extended head peering east. The body of this aboriginal work of art, crude in form, was of ma.s.sive silver. And to it were attached overlapping plates of gold in the similitude of feathers. The unfolded wings were also of gold. The head, beak and talons were of gold, and the eyes were two polished bits of quartz. The idol, for such no doubt it was, stood forty inches in height and weighed about three hundred pounds.

The base on which the precious eagle stood was completely covered with the deepest blue turquoise. At its foot and covering the dais were the crumbled traces of many articles of cloth, feathers, bits of wood and pottery, and the like, all, no doubt, fragments of priestly utensils of worship. The most ornate and best preserved of these was a large flat bowl covered on the inside with skillfully cut mother-of-pearl. This was still iridescently beautiful, and the more striking because its milk white exterior was unmarked by decoration.

Each mummy, when hauled into the open air and examined, gave more positive proof of the riches that had been collected in this sacred retreat. The funeral bowls placed at the feet of the bodies varied in form and material. Some of these were of plain black and white pottery, others were coated with gold, silver, or mother-of-pearl.

The bowls apparently had once contained food. In all there were two golden bowls, four of silver, one of pearl and one of pottery.

Each mummy was wound with as much care as was ever bestowed on the Egyptian royal dead. The woven wrappings were coated with pitch and beneath them were colored cotton cloths, affording proof of a high civilization. The richest treasures of the dead were the breastplates and necklaces found on each. These astounded the young investigators.

These plates and beads had been strung on deer sinews, which, not having been protected by pitch, were now only lines of dust. But, lying on the breast of each there was invariably a "body sc.r.a.per,"

(as Major Honeywell afterwards termed them) of gold, silver or mother-of-pearl. Mother-of-pearl discs were the commonest neck decoration. Of these the boys discovered four.

On three of the bodies were pierced pearl bead necklaces. On the most elaborately wrapped figure, that of a head priest or high chief, came the crowning discovery. This was a necklace of pierced amethysts. And on the breast of this figure was a flat plate of gold with sixteen radiating points, each of these terminating in a large luminous unpierced and polished amethyst.

About the waist of this shriveled figure were the remains of a jeweled belt. The foundation or back of this had dissolved into dust, but careful unwrapping of the cerements revealed the priceless ornamentation. This decoration was of alternating squares of mother-of-pearl, in each of which glistened a perfect amethyst, and of matchless turquoise squares set with great pearls.

CHAPTER x.x.x

A QUARTER OF A TON OF TREASURE

It was impossible for the boys even to venture an estimate on the value of the immense mine of turquoise, although they realized that the increasing scarcity of the jewel made the beautiful and unique specimens everywhere about them worth a great deal of money. Nor had they any idea of the value of the mother-of-pearl bowls, nor of the hundreds of beautiful and unique ceremonial and funeral urns and vases. Least of all, could they put even an approximate price on the amethyst and pearl necklaces. Even their most sanguine hopes of discovering the hidden city of Cibola had not led the adventurers to investigate the current prices of precious stones.

Knowing, however, what the prices of gold and silver were, they could form some estimate of the worth of this part of the treasure.

By comparison with the known weights of certain articles in the car the two boys made the following list of metal pieces discovered:

GOLD POUNDS

Twelve bands. Weight each 2 lbs. I oz. 26 Two bowls. Weight each 6 lbs 12 Two "body-sc.r.a.pers." Weight each 9 oz 1 1/2 Wings, head and talons of Sacred Eagle 82 Breastplate 3 Radiating sun over entrance 12

Total, 136 1/2, or 1,638 ounces.

SILVER POUNDS

Twenty-four bands. Weight each I lb. 8 oz 40 Four bowls. Weight each 5 lbs 20 Four "body-sc.r.a.pers." Weight 10 oz.. 3 1/3 Body of Sacred Eagle. Weight 218 Ninety-six miscellaneous rings, bands, anklets and wristlets, many set with mother-of-pearl and turquoise 16 1/3

Total, 297 2/3, or 3,580 ounces.

The market value of these precious metals was easily computed. The silver at sixty cents an ounce was worth $2,148. The more valuable gold, at twenty dollars an ounce, was worth $32,760. Together, the 484 pounds were worth $34,908.

"And one-third of that," said Ned with a smile--almost discernible beneath his dust--begrimed face, "is nearly $12,000. And that is $6,000 for each of us."

"But how about the amethysts and pearls?" said Alan.

"I suppose," answered Ned, "that they are worth a great deal more, but I don't know. I should think that those that have no holes in them would be very valuable."

All this figuring was intensely interesting, but the boys, as the revelation progressed, knew that they were now facing a new problem.

They could not possibly carry that gold and silver, to say nothing of even a portion of the exquisite mother-of-pearl bowls or the finest samples of the turquoise. When, in the end, nearly a quarter of a ton of the metal treasure alone lay in a heap in the corner of the temple vestibule they could come to but one conclusion.

This portion of the treasure would have to be removed at another time.

"It has lain here undisturbed for over three hundred years," said Ned hopefully, though sadly, "and we'll have to take a chance that it can be left a while longer."

Sorrowfully enough Alan agreed. It was to be no easy work getting out of the wilderness, and food must be carried. That might be more precious to them than gold before they saw a railroad again. The boys agreed to take at noon the next day the exact lat.i.tude and longitude of the mesa. The lat.i.tude, on one slip of paper, was to be carried by one boy and the longitude, on another piece, was to be in the possession of the other. This was a precaution against accidental revelation of the treasure mesa.

The set jewels were removed. There were two hundred and ninety-four pierced pearls and ninety-eight pierced amethysts. Among the whole gems, eighteen magnificent pearls were extracted from the jeweled belt. Eighteen unpierced amethysts were also taken from the alternating turquoise squares of the belt and sixteen magnificent amethysts from the gold breastplate.

It was then that the sewing kit supplied by Alan's sister Mary came into service. A small piece of aluminum waterproof silk cabin covering was converted into two flat bags and in these the stones, equally divided, were enclosed and concealed under the clothing and beneath the right arm of each lad. In addition, each boy took half of the mother-of-pearl and turquoise belt plates as the finest specimens of each material.

"And to show that there is gold too," suggested Alan, "we might as well take along, these gold 'sc.r.a.pers,' which won't bother us much,"

So these two pieces were strung on cords and suspended about the necks of the young treasure seekers.

"And to-morrow," exclaimed Ned joyfully when all this was done, "we'll get down from here and get a bath."

"Amen," added Alan earnestly.

Until it was twelve o'clock, the time to take their observation, the boys spent the next morning in last preparations and making everything shipshape. The framework of the car was left intact, but weighted by stones to prevent injury by the wind. Everything movable was stored in the entrance room of the temple, including three and one-half cans of gasoline. The engine was oiled and covered with blankets. Underneath the smoothly folded balloon, in the folds of which dry sand had been liberally sprinkled to prevent possible adhesions of the varnish, lay nearly thirty-five thousand dollars' worth of curiously wrought gold and silver. This was first completely covered with sand.

The two provision packs for the retreat to civilization had been carefully arranged. How long the journey might take the, could not estimate. They had decided to their way east, in hope of falling in with Elmer and Bob, and this meant the crossing of at least two mountain ranges and thirty miles of barren foothills to Mount Wilson. Then, if they turned south, they would traverse eighty-five miles of sandy plain in which water was infrequent.

Their own provisions were exhausted. What they now depended on was the emergency case secured from the Arrow. This supply was intended to be enough for two men for two weeks.

"It certainly ought not take us that long,"' complained Alan. "Why not leave half the supply and take a little gold?"

But Ned was obdurate. He explained that they might fall in with the other boys, and that if they did Elmer and Bob might be wholly out of supplies.

"We can come back if we get out in good shape," explained Ned, "and if we don't get out what'll be the use of a back load of gold?"