"September 12 was devoted to levelling and topographical work at Ampersand Pond, a solitary lake locked in by mountains, and seldom visited. There was no boat upon its surface, and in order to complete the hydrographical work we had now, of necessity, to try my portable canvas boat, which had hitherto done service as bed or tent. Cutting green rods for ribs, we unrolled the boat and tied them in, lashing poles for gunwales at the sides, and in a short time our canvas canoe, buoyant as a cork, was floating on the water. The guides, who had been unable to believe that the flimsy bag they carried could be used as a boat, were in ecstasies. Rude but efficient paddles were hastily hewn from the nearest tree, and soon we were all gliding in our ten-pound boat over the waves of Ampersand, which glittered in the morning sunlight. To the guides the boat was something astonishing; they could not refrain from laughter to find that they were really afloat in it, and pointed with surprise at the waves, which could be seen through the boat, rippling against its sides. With the aid of the boat, with prismatic compass and sextant, I was able to secure an excellent map of the lake; and we almost succeeded in catching a deer, which was driven into the lake by a strange hound. The dog lost the trail at the water, and desiring to put him on the track, we paddled to him. He scrambled into the boat with an air of satisfaction, as if he had always travelled in just such a thing. Soon we had regained the trail, and making the mountains echo to his voice, he again pursued the deer on into the trackless forest. "Continuing our work, we passed down into the outlet, where, in trying to effect a landing, we suddenly came face to face with a large panther, which had evidently been watching us. He fled at our approach. "Our baggage was quickly packed, and the temporary frame of the canoe having been taken out and thrown away, we rolled up our boat and put it in the bottom of a knapsack. . . . The same day by noon we reached Cold Brook again, here navigable. In an hour and a half we had re-framed the canvas, cut out two paddles from a dry cedar-tree, had dinner, loaded the boat, and were off; easily gliding down stream to the Saranac River. Three men, the heaped baggage in the centre, and the solemn hound, who seemed to consider himself part of the company, sitting upright near the prow, forming in all a burden of about one third of a ton, was a severe test of the green boughs of which we had made the frame.