Next he took it to the mirror, then to nest in the dormitory tree. Rhody's Cerebral"Vortex" gets tangled. Next he discovered some of that composite plant that has velvety leaves and stems even when dry, and which is attractive to him as a nesting material-- or was last year at certain stages of his work. It is also the stuff he has used to "carpet" his house in the roost tree. He now tried to gather a billful of it while still holding the mouse, but without success. I now gathered some of it and placed it at the point where Rhody invariably takes off in carrying twigs up to his nest. In a few minutes Rhody came and saw it and was im- mediately attracted by it, but the mouse proved a problem. He want- ed to take the weed to the nest, and also the mouse. After many struggles with the combination, during which the mouse was repeated- ly dropped while he was attempting to gather stalks at the same time, he managed to hold on to a twig and the mouse simultaneously. As the mouse was much larger than the stalk, the only way this could be ac- complished was by getting the stalk back of the mouse. He now carried both up to the inside of the nest. The problem now became: how to get the stalk out from "behind" the mouse without dropping the latter. He worried over this some time, with rumbling hroos- (reinforced by the resonance effect of the house) and many twistings and turnings. The predicament was solved by dropping both, then picking up the mouse. Apparently, now, he had in his mind, the mouse-nest association and the weed-nest association. It was his desire to hold on to the mouse, yet he wanted to get more of the weed (as was shown later). He was now clearly confused and, in the next ten minutes was in and out of his nest a dozen times, but never coming down to the ground. He hrooded and fidgeted, plainly at a loss. He finally took the obvious course by swallowing the mouse, whereupon he lay quietly in the nest and his hroos changed to whines. (That is: he was now formally recognizing my presence--to me). When he came down he came at once to my feet where the weed-stalks were and began happily to carry them up and place them inside, where their flexibility enabled him to stow them properly. There was no longer evidence of mental confusion and he was still confining his attention to the weeds when visitors came, and I left; (12:30). but he continued to work and, much to the delight of my visitors, he came up into the court while we were there and carried off more stuff. About 9 A.M. Neo and his mate were in the north-east--Neo singing. (Verified by going there and feeding both near the cork elm. Neo, followed by N2 in a few seconds, moved to the echo tree 250 yards south. I then went to watch Rhody as reported above. In a few min- utes Neo came, again followed by N2, trotting along the bank. They went to their "cove" near the hole in the fence. I now watched all three birds. Neo wants to nest here still? Neo soon picked up a twig and carried it to the kangaroo thorn about 20 feet away, climbed up and began to clear a space by crouching and pushing with his breast while fluttering his wings. He placed the twig and called loudly and me- lodiously for his mate. She came and both inspected the location with some care, but moved away, still remaining "at home". A visit now and then to them while watching Rhody principally, showed them at home each time, but not working. However, at 1:30 P.M. I found Neo making regular trips with twigs to still another place about 6 feet from the first. And, for the first time N2 also gathered material. Furthermore, she placed them in the same place as Neo did his. I watched a few minutes and they continued to cooperate. N2 cooper- ates and both work.