(Absent until 3:30). On returning Julio stated Rhody had been to the cage again, and had just left there as I came in and was on the bank near the fig tree. I called him up to the driveway, through the shrubbery on the bank, and offered him a mouse. He cried, took it and then abandoned it without killing it. At 4 P.M. R left for the west lot. I had to go out again and saw him near the ladder tree. On returning about 4:30 I was surprised to find that R was not in his roost, so began a search of the lot to see if he had adopted another place, less exposed. In a few minutes he dropped down from a tree and headed toward the ladder tree. He jumped to his regular roost at precisely 5:00½--late for him. When Rhody abandoned the mouse it was offered to R5. As he had not taken it at 5:10, it was put back with its fellows. R5 thus had only one mouse today. There are no indications that the cold snap is over. January 22nd. Cold again, but not so cold as last night. (I had forgotten to reset the minimum thermometer). At 9 A.M. I went out to see if Rhody was still in his roost and was walking rapidly along the sidewalk near his post, when I came upon him suddenly 4 feet away, sunning his back. He did not alter his pose in the slightest. He probably saw me coming. If so, there can be little doubt of his having recognized me, because he would have fled from a stranger long before he got near. I now witnessed a detail of his behavior that, to my mind, gives evidence of a certain ability to perceive a connection between an action and its probable consequences in an entirely new situation and act upon his judgment as to what that consequence will be. In this particular case that judgment was wrong, due to the fact that the action, through accident, did not produce the result that it ordinarily would have. The sketch below shows the physical set-up at the time: Rhody sat on the bank as shown. I stood on the walk and tossed a worm along the course marked "Trajectory of worm". The worm struck the branch overhanging Rhody and fell on the slope between him and me. If it had not struck the branch it would have gone over his head and landed beyond him under the bush. He did not see it strike the branch and fall, but expected it to pass over his head, and as a consequence, looked for it where it should have landed and not where it did. To make sure that it was not through accident that this action was brought about, I repeated the act several times with the same result.