From the appearance of the brilliant crystals round about us I suspected their nature.

I tasted a piece. This was a cavern of rock salt. There was no doubt about it—here was an unlimited supply of the best and purest salt! But one thing detracted from my entire satisfaction and delight—large crystals lay scattered here and there, which, detached from the roof, had fallen to the ground; this, if apt to recur, would keep us in constant peril. I examined some of the masses and discovered that they had been all recently separated, and therefore concluded that the concussion of the air occasioned by the rockets had caused their fall. To satisfy ourselves, however, that there were no more pieces tottering above us, we discharged our guns from the entrance, and watched the effect. Nothing more fell—our magnificent abode was safe.

We returned to Falconhurst with minds full of wonder at our new discovery, and plans for turning it to the best possible advantage.

Nothing was now talked of but the new house, how it should be arranged, how it should be fitted up. The safety and comfort of Falconhurst, which had at first seemed so great, now dwindled away in our opinion to nothing; it should be kept up, we decided, merely as a summer residence, while our cave should be formed into a winter house and impregnable castle. Our attention was now fully occupied with this new house. Light and air were to be admitted, so we hewed a row of windows in the rock, where we fitted the window cases we had brought from the officers' cabins. We brought the door, too, from Falconhurst, and fitted it in the aperture we had made. The opening in the trunk of the tree I determined to conceal with bark, as less likely to attract the notice of wild beasts or savages should they approach during our absence. The cave itself we divided into four parts: in front, a large compartment into which the door opened, subdivided into our sitting, eating, and sleeping apartments; the righthand division containing our kitchen and workshop, and the left our stables; behind all this, in the dark recesses of the cave, was our storehouse and powder-magazine. Having already undergone one rainy season, we knew well its discomforts, and thought of many useful arrangements in the laying out of our dwelling. We did not intend to be again smoke-dried; we therefore contrived a properly built fire place and chimney; our stable arrangements, too, were better, and plenty of space was left in our workshop that we should not be hampered in even the most extensive operations.

Our frequent residence at Tentholm revealed to us several important advantages which we had not fore-seen. Numbers of splendid turtles often came ashore to deposit their eggs in the sand, and their delicious flesh afforded us many a sumptuous meal. When more than one of these creatures appeared at a time, we used to cut off their retreat to the sea, and, turning them on their backs, fasten them to a stake driven in close by the water's edge, by a cord passed through a hole in their shell. We thus had fresh turtle continually within our reach; for the animals throve well thus secured, and appeared in as good condition, after having been kept thus for several weeks, as others when freshly caught. Lobsters, crabs, and mussels also abounded on the shore. But this was not all; an additional surprise awaited us.

As we were one morning approaching Tentholm, we were attracted by a most curious phenomenon. The waters out at sea appeared agitated by some unseen movement, and as they heaved and boiled, their surface, struck by the beams of the morning sun, seemed illuminated by flashes of fire. Over the water where this disturbance was taking place hovered hundreds of birds, screaming loudly, which ever and anon would dart downward, some plunging beneath the water, some skimming the surface. Then again they would rise and resume their harsh cries. The shining, sparkling mass then rolled onward, and approached in a direct line our bay, followed by the feathered flock above. We hurried down to the shore to further examine this strange sight.

I was convinced as we approached that it was a shoal or bank of herrings.

No sooner did I give utterance to my conjecture than I was assailed by a host of questions concerning this herring-bank, what it was, and what occasioned it.

"A herring-bank," I said, "is composed of an immense number of herrings swimming together. I can scarcely express to you the huge size of this living bank, which extends over a great area many fathoms deep. It is followed by numbers of great ravenous fish, who devour quantities of the herrings, while above hover birds, as you have just seen, ready to pounce down on stragglers near the top. To escape these enemies, the shoal makes for the nearest shore, and seeks safety in those shallows where the large fish cannot follow. But here it meets with a third great enemy. It may escape from the fish and elude the vigilance of sharp-sighted birds, but from the ingenuity of man it can find no escape. In one year millions of these fish are caught, and yet the roes of only a small number would be sufficient to supply as many fish again."

Soon our fishery was in operation. Jack and Fritz stood in the water with baskets, and baled out the fish, as one bales water with a bucket, throwing them to us on the shore. As quickly as possible we cleaned them, and placed them in casks with salt, first a layer of salt, and then a layer of herrings, and so on, until we had ready many casks of pickled fish.