They then collected along on the top of the dam, and seemed to hold a sort of consultation, after which they scattered for the banks of the stream, but soon returned, walking on their hind legs, and each bringing a load of mud or stones, held between his fore paws and throat. These loads were successively deposited, as they came up, among the stems and interlacing branches of the trees and bushes they had just laid down, giving each deposited pile, as they turned to go back, a smart blow with the flat of their broad thick tails, producing the same sound as the one I have mentioned as the signal-raps for calling them out to work, only far less loud and sharp, since the former raps were struck on water, and the latter on mud or rubbish. Thus they continued to work,--and work, too, with a will, if any creatures ever did,--till I had seen nearly the whole of the last layers plastered over. "Thinking now I had seen all that would be new and useful to me, I noiselessly crept away and returned to camp, to lay awake half the night, in my excitement, and to dream, the other half, about this magnificent society of beavers, whose numbers I could not make less than three dozen. I did not go to steal another view of the place for nearly a week, and then went in the daytime, there now being no moon, till late,--when, to my surprise, I found the dam finished, and the river flowed into a pond of several acres, while on each side, ranged along, one after another, stood three family dwellings in different states of progress; some of them only rising to the surface of the water, showing the nature of the structure, which, you know, is built up with short, small logs, and mud, in a squarish form, of about the size of a large chimney; while others, having been built up a foot or two above the water, and the windows fashioned, had been arched over with mud and sticks, and were already nearly finished. "Knowing that the establishment was now so nearly completed that the beavers would not relinquish it without being disturbed by the presence of a human foe,--which they will sometimes detect, I think, at nearly a quarter of a mile distance,--I concluded to keep entirely away from them till the time of my contemplated onslaught, which I finally decided to begin on one of the first days of the coming November.