As with most wild creatures, the squirrels that live in touch with civilization are much keener witted than their wilderness brethren. The most interesting one I ever knew lived in the trees just outside my dormitory window, in a New England college town. He was the patriarch of a large family, and the greatest thief and rascal among them. I speak of the family, but, so far as I could see, there was very little family life. Each one shifted for himself the moment he was big enough, and stole from all the others indiscriminately. It was while watching these squirrels that I discovered first that they have regular paths among the trees, as well defined as our own highways. Not only has each squirrel his own private paths and ways, but all the squirrels follow certain courses along the branches in going from one tree to another. Even the strange squirrels, which ventured at times into the grove, followed these highways as if they had been used to them all their lives. On a recent visit to the old dormitory I watched the squirrels for a while, and found that they used exactly the same paths,--up the trunk of a big oak to a certain boss, along a branch to a certain crook, a jump to a linden twig and so on, making use of one of the highways that I had watched them following ten years before. Yet this course was not the shortest between two points, and there were a hundred other branches that they might have used. I had the good fortune one morning to see Meeko, the patriarch, make a new path for himself that none of the others ever followed so long as I was in the dormitory. He had a home den over a hallway, and a hiding place for acorns in a hollow linden. Between the two was a driveway; but though the branches arched over it from either side, the jump was too great for him to take. A hundred times I saw him run out on the farthest oak twig and look across longingly at the maple that swayed on the other side. It was perhaps three feet away, with no branches beneath to seize and break his fall in case he missed his spring, altogether too much for a red squirrel to attempt. He would rush out as if determined to try it, time after time, but always his courage failed him; he had to go down the oak trunk and cross the driveway on the ground, where numberless straying dogs were always ready to chase him. One morning I saw him run twice in succession at the jump, only to turn back. But the air was keen and bracing, and he felt its inspiration. He drew farther back, then came rushing along the oak branch and, before he had time to be afraid, hurled himself across the chasm. He landed fairly on the maple twig, with several inches to spare, and hung there with claws and teeth, swaying up and down gloriously. Then, chattering his delight at himself, he ran down the maple, back across the driveway, and tried the jump three times in succession to be sure he could do it.