At the far end of the dam, a hundred feet from the flume, there was an "apron," beneath a waste-way, where formerly the overflow of water went out and found its way for a hundred and fifty yards, perhaps, by another channel along the foot of a steep bank; then, issuing through a dense willow thicket, it joined the main stream from the flume.

Water rarely flowed here now, except in time of freshets, or during the spring and fall rains; and there was such a prodigious tangle of alder, willow, clematis and other vines that for years no one had penetrated it. From a fisherman's point of view there seemed no inducement to do so, since this secondary channel appeared to be dry for most of the time.

In point of fact, however, and unknown to us, there was a very deep hole at the foot of the high bank where the channel was obstructed by a ledge. The hole thus formed was thirty or forty feet in length, and at the deepest place under the bank the water was six or seven feet in depth; but such was the tangle of brush above, below and all about it that one would never have suspected its existence.

An experienced and observing fisherman would have noted, however, that always, even in midsummer, there was a tiny rill of water issuing through the willows to join the main stream; and that, too, when not a drop of water was running over the waste-way of the dam. He would have noted also that this was unusually clear, cold water, like water from a spring. There was, in fact, a copious spring at the foot of the bank near the deep hole; and this hole was maintained by the spring, and not by the water from above the dam.

Addison was a born observer, a naturalist by nature; and on one of these hopeful trips to the mill-pond, he had searched out and found that hidden hole on the old waste-way channel, below the dam. When he had forced his way through the tangled mass of willows, alders and vines and discovered the pool, he found eighteen or nineteen splendid speckled trout in it.

Either these trout had come over the waste-way of the dam in time of freshet, and had been unable to get out through the rick of small drift stuff at the foot of the hole; or else perhaps they were trout that had come in there as small fry and had been there for years, till they had grown to their present size. Certain it is that they were now two-and three-pound trout.

Did Addison come home in haste to tell us of his discovery? Not at all. He did not even allow himself to catch one of the trout at that time, for he knew that Halstead and I had seen him set off for the old mill-pond. He came home without a fish, and remarked at the dinner-table that it was of no use to fish for trout in that old pond—which was true enough.

The next wet day, however, he said at breakfast to the Old Squire, "If you don't want me, sir, for an hour or two this morning, I guess I'll go down the Horr Brook and see if I can catch a few trout."

Gramp nodded, and we saw Addison dig his worms and set off. The Horr Brook was on the west side of the farm, while the old mill-pond lay to the southeast. What Addison did was to fish down the Horr Brook for about a mile, to the meadows where the lake woods began. He then made a rapid detour around through the woods to the Foy Brook, and caught four trout out of the hidden preserve below the old dam. Afterwards he went back as he had come to the Horr Brook, then strolled leisurely home with eight pounds of trout.

Of course there was astonishment and questions. "You never caught those trout in the Horr Brook!" Halstead exclaimed. But Addison only laughed.