yard watching me. I retraced my steps, half lead and half followed by the bird, to the tool-house and got him a smaller mouse. This was accepted at once and carried off with full ceremony. There had been none with the abandoned mouse. Now, beginning with 10:45: How is Rhody's behavior to be interpreted--in plain language? First: He has remembered, based on extremely limited experience, that young birds in a cage are likely to be found in a certain limited area in or near this room. Second: He is attracted by these birds. Third: In yielding to this attraction, he discovers that a well known provider of food is present. Fourth: He is confronted by two centers of attraction: the birds and myself. Fifth: He moves toward the group, showing no excitement: That is, he moves slowly, without stealth, does not raise his crest and merely glances at the cage. When one of its occupants squalls, he pauses and looks at it for a moment, then examines the ground-cover for food. Worms are tossed into the cover and he loses all interest in the birds. They are, on this occasion, a less powerful attraction than food known to be available. Sixth: He sees a rat and goes to investigate, making no attack, and showing no excitement. Curiosity as to this new factor overcomes the two previous attractions--for the time being. Seventh: He returns at once to the first group after satisfying as to the rat. His interest now appears to be primarily in food, though a sudden movement in the cage causes him to take a step or two nearer and observe its occupants. Eighth: He loses interest and departs (or perhaps wishes to divert my attention to the mouse question). Ninth: He knows I am a mouse provider and follows me. Tenth: He is disappointed at my offering. Based on previous experience, he decides to wait for a more desirable substitution. Eleventh: None forthcoming, he reluctantly accepts the first but decides it will not do and abandons it. He will neither eat it nor carry it about as an offering. Twelfth: He loses hope in receiving a more suitable mouse and turns away. Thirteenth: He sees me about to disappear, hope revives and/or he decides to remind me of his needs, remembering that I do not usually refuse to "come across" in the end. Fourteenth: He follows me (unknown to me). I do not stop, so as I am about to disappear he calls me ,and when I go back to him, partly leads, partly follows to the mousery, finds the small mouse offered is what he wants, takes it and, this time, treats it with full ceremony and carries it off.