was lost in the downward plunge of the _Mary of the Tower_, that left the strait empty save for the sun's fiery blaze and the last smoke-like evaporation of the mists.

ROOUM

For all I ever knew to the contrary, it was his own name; and something about him, name or man or both, always put me in mind, I can't tell you how, of negroes. As regards the name, I dare say it was something huggermugger in the mere sound--something that I cla.s.sed, for no particular reason, with the dark and ignorant sort of words, such as "Obi" and "Hoodoo." I only know that after I learned that his name was Rooum, I couldn't for the life of me have thought of him as being called anything else.

The first impression that you got of his head was that it was a patchwork of black and white--black bushy hair and short white beard, or else the other way about. As a matter of fact, both hair and beard were piebald, so that if you saw him in the gloom a dim patch of white showed down one side of his head, and dark tufts cropped up here and there in his beard.

His eyebrows alone were entirely black, with a little sprouting of hair almost joining them. And perhaps his skin helped to make me think of negroes, for it was very dark, of the dark brown that always seems to have more than a hint of green behind it. His forehead was low, and scored across with deep horizontal furrows.

We never knew when he was going to turn up on a job. We might not have seen him for weeks, but his face was always as likely as not to appear over the edge of a crane-platform just when that marvellous mechanical intuition of his was badly needed. He wasn't certificated. He wasn't even trained, as the rest of us understood training; and he scoffed at the drawing-office, and laughed outright at logarithms and our laborious methods of getting out quant.i.ties. But he could set sheers and tackle in a way that made the rest of us look silly. I remember once how, through the parting of a chain, a sixty-foot girder had come down and lay under a ruck of other stuff, as the bottom chip lies under a pile of spellikins--a hopeless-looking smash. Myself, I'm certificated twice or three times over; but I can only a.s.sure you that I wanted to kick myself when, after I'd spent a day and a sleepless night over the job, I saw the game of t.i.t-tat-toe that Rooum made of it in an hour or two. Certificated or not, a man isn't a fool who can do that sort of thing. And he was one of these fellows, too, who can "find water"--tell you where water is and what amount of getting it is likely to take, by just walking over the place. We aren't certificated up to that yet.

He was offered good money to stick to us--to stick to our firm--but he always shook his black-and-white piebald head. He'd never be able to keep the bargain if he were to make it, he told us quite fairly. I know there are these chaps who can't endure to be clocked to their work with a patent time-clock in the morning and released of an evening with a whistle--and it's one of the things no master can ever understand. So Rooum came and went erratically, showing up maybe in Leeds or Liverpool, perhaps next on Plymouth breakwater, and once he turned up in an out-of-the-way place in Glamorganshire just when I was wondering what had become of him.

The way I got to know him (got to know him, I mean, more than just to nod) was that he tacked himself on to me one night down Vauxhall way, where we were setting up some small plant or other. We had knocked off for the day, and I was walking in the direction of the bridge when he came up. We walked along together; and we had not gone far before it appeared that his reason for joining me was that he wanted to know "what a molecule was."

I stared at him a bit.

"What do you want to know that for?" I said. "What does a chap like you, who can do it all backwards, want with molecules?"

Oh, he just wanted to know, he said.

So, on the way across the bridge, I gave it him more or less from the book--molecular theory and all the rest of it. But, from the childish questions he put, it was plain that he hadn't got the hang of it at all.

"Did the molecular theory allow things to pa.s.s through one another?" he wanted to know; "_Could_ things pa.s.s through one another?" and a lot of ridiculous things like that. I gave it up.

"You're a genius in your own way, Rooum," I said finally; "you know these things without the books we plodders have to depend on. If I'd luck like that, I think I should be content with it."

But he didn't seem satisfied, though he dropped the matter for that time.

But I had his acquaintance, which was more than most of us had. He asked me, rather timidly, if I'd lend him a book or two. I did so, but they didn't seem to contain what he wanted to know, and he soon returned them, without remark.

Now you'd expect a fellow to be specially sensitive, one way or another, who can tell when there's water a hundred feet beneath him; and as you know, the big men are squabbling yet about this water-finding business.

But, somehow, the water-finding puzzled me less than it did that Rooum should be extraordinarily sensitive to something far commoner and easier to understand--ordinary echoes. He couldn't stand echoes. He'd go a mile round rather than pa.s.s a place that he knew had an echo; and if he came on one by chance, sometimes he'd hurry through as quick as he could, and sometimes he'd loiter and listen very intently. I rather joked about this at first, till I found it really distressed him; then, of course, I pretended not to notice. We're all cranky somewhere, and for that matter, I can't touch a spider myself.

For the remarkable thing that overtook Rooum--(that, by the way, is an odd way to put it, as you'll see presently; but the words came that way into my head, so let them stand)--for the remarkable thing that overtook Rooum, I don't think I can begin better than with the first time, or very soon after the first time, that I noticed this peculiarity about the echoes.

It was early on a particularly dismal November evening, and this time we were somewhere out south-east London way, just beyond what they are pleased to call the building-line--you know these districts of wretched trees and grimy fields and market-gardens that are about the same to real country that a slum is to a town. It rained that night; rain was the most appropriate weather for the brickfields and sewage-farms and yards of old carts and railway-sleepers we were pa.s.sing. The rain shone on the black hand-bag that Rooum always carried; and I sucked at the dottle of a pipe that it was too much trouble to fill and light again. We were walking in the direction of Lewisham (I think it would be), and were still a little way from that eruption of red-brick houses that ... but you've doubtless seen them.

You know how, when they're laying out new roads, they lay down the narrow strip of kerb first, with neither setts on the one hand nor flagstones on the other? We had come upon one of these. (I had noticed how, as we had come a few minutes before under a tall hollow-ringing railway arch, Rooum had all at once stopped talking--it was the echo, of course, that bothered him.) The unmade road to which we had come had headless lamp-standards at intervals, and ramparts of grey road-metal ready for use; and save for the strip of kerb, it was a broth of mud and stiff clay. A red light or two showed where the road-barriers were--they were laying the mains; a green railway light showed on an embankment; and the Lewisham lamps made a rusty glare through the rain.

Rooum went first, walking along the narrow strip of kerb.

The lamp-standards were a little difficult to see, and when I heard Rooum stop suddenly and draw in his breath sharply, I thought he had walked into one of them.

"Hurt yourself?" I said.

He walked on without replying; but half a dozen yards farther on he stopped again. He was listening again. He waited for me to come up.

"I say," he said, in an odd sort of voice, "go a yard or two ahead, will you?"

"What's the matter?" I asked, as I pa.s.sed ahead. He didn't answer.

Well, I hadn't been leading for more than a minute before he wanted to change again. He was breathing very quick and short.

"Why, what ails you?" I demanded, stopping.

"It's all right.... You're not playing any tricks, are you?..."

I saw him pa.s.s his hand over his brow.

"Come, get on," I said shortly; and we didn't speak again till we struck the pavement with the lighted lamps. Then I happened to glance at him.

"Here," I said brusquely, taking him by the sleeve, "you're not well.

We'll call somewhere and get a drink."

"Yes," he said, again wiping his brow. "I say ... did you hear?"

"Hear what?"

"Ah, you didn't ... and, of course, you didn't feel anything...."

"Come, you're shaking."

When presently we came to a brightly lighted public-house or hotel, I saw that he was shaking even worse than I had thought. The shirt-sleeved barman noticed it too, and watched us curiously. I made Rooum sit down, and got him some brandy.

"What was the matter?" I asked, as I held the gla.s.s to his lips.

But I could get nothing out of him except that it was "All right--all right," with his head twitching over his shoulder almost as if he had touch of the dance. He began to come round a little. He wasn't the kind of man you'd press for explanations, and presently we set out again.

He walked with me as far as my lodgings, refused to come in, but for all that lingered at the gate as if loath to leave. I watched him turn the corner in the rain.

We came home together again the next evening, but by a different way, quite half a mile longer. He had waited for me a little pertinaciously.

It seemed he wanted to talk about molecules again.

Well, when a man of his age--he'd be near fifty--begins to ask questions, he's rather worse than a child who wants to know where Heaven is or some such thing--for you can't put him off as you can the child. Somewhere or other he'd picked up the word "osmosis," and seemed to have some glimmering of its meaning. He dropped the molecules, and began to ask me about osmosis.

"It means, doesn't it," he demanded, "that liquids will work their way into one another--through a bladder or something? Say a thick fluid and a thin: you'll find some of the thick in the thin, and the thin in the thick?"

"Yes. The thick into the thin is ex-osmosis, and the other end-osmosis.

That takes place more quickly. But I don't know a deal about it."

"Does it ever take place with solids?" he next asked.

What was he driving at? I thought; but replied: "I believe that what is commonly called 'adhesion' is something of the sort, under another name."

"A good deal of this bookwork seems to be finding a dozen names for the same thing," he grunted; and continued to ask his questions.

But what it was he really wanted to know I couldn't for the life of me make out.

Well, he was due any time now to disappear again, having worked quite six weeks in one place; and he disappeared. He disappeared for a good many weeks. I think it would be about February before I saw or heard of him again.