"So far as I remember—" began the Commandant, and paused. (What on earth was delaying Fossell?)

"You will excuse me, sir, but might I ask what bait you employ as a rule?"

The Commandant answered that for preference he used sand-eels. The clerk replied that sand-eels took some getting; and that, if the remark wouldn't be taken amiss, it was all very well to talk of sand-eels when you were in a position to employ a couple of men to spend half a day in netting them for you; but that for a young chap in his position, sand-eels were out of the question.

"There's the bank-hours, to begin with," he wound up, lucidly; "and, besides, when you've caught 'em they're the most perishable bait going."

The Commandant incoherently promised to reserve a portion of his next catch, and to send Archelaus with a creelful; all this with his eyes wandering in desperation to the glass door. The young man was profuse in thanks.

"You will excuse my discussing sport with you, sir? Sport, they say, puts all men on a level—though, of course, I should not dream of claiming——"

But at this point the glass door opened, and Mr. Fossell emerged, briskly, holding what appeared to be a fair-sized stone.

"How will you take it?" he asked, depositing this upon the counter.

"I beg your pardon?" the Commandant stammered, his eyes riveted on the stone.

"Notes or gold?" Mr. Fossel picked the specimen up, and rubbed it gently with his sleeve. "Now, that's a queer thing, eh? My brother-in-law sent it to me last week, and I've been using it for a paper-weight, not being a scientific man. But just you look into it. He tells me there are hundreds lying about where he lives—Ogwell, the place is, in Devonshire, just behind Newton Abbot—and that they're called madrepores. He's a humorous fellow, too, is my brother-in-law. You see the joke, of course?"