There are numerous long covered bridges spanning the Delaware, and under some of these I saw the cliff swallow at home, the nests being fastened to the under sides of the timbers,--as it were, suspended from the ceiling instead of being planted upon the shelving or perpendicular side, as is usual with them. To have laid the foundation, indeed, to have sprung the vault downward and finished it successfully, must have required special engineering skill. I had never before seen or heard of these nests being so placed. But birds are quick to adjust their needs to the exigencies of any case. Not long before, I had seen in a deserted house, on the head of the Rondout, the chimney swallows entering the chamber through a stove-pipe hole in the roof, and gluing their nests to the sides of the rafters, like the barn swallows. I was now, on the third day, well down in the wilds of Colchester, with a current that made between two and three miles an hour,--just a summer idler's pace. The atmosphere of the river had improved much since the first day,--was, indeed, without taint,--and the water was sweet and good. There were farmhouses at intervals of a mile or so; but the amount of tillable land in the river valley or on the adjacent mountains was very small. Occasionally there would be forty or fifty acres of flat, usually in grass or corn, with a thrifty-looking farmhouse. One could see how surely the land made the house and its surrounding; good land bearing good buildings, and poor land poor In mid-forenoon I reached the long placid eddy at Downsville, and here again fell in with two boys. They were out paddling about in a boat when I drew near, and they evidently regarded me in the light of a rare prize which fortune had wafted them.