The subject of the picture was always carefully chosen by one of the experimenters--Mrs Sidgwick or Miss Alice Johnson. Any possibility of the percipient being able to guess at the subject through chance, association, or ideas was rigorously excluded. To prevent any hint being unconsciously imparted by the third experimenter, Mr G. A. Smith, silence was enjoined upon him, and he was placed behind the percipient or in another room; yet the percipient actually saw and described the projecting impression as if it were a real picture before his eyes. When Mr Smith went downstairs with Miss Johnson he was asked by her to think of an eagle pursuing a sparrow. Mrs Sidgwick, who remained upstairs with P., the percipient, in a few minutes induced him to see a round disc of light on the imaginary lantern-sheet, and then he saw in it "something like a bird," which disappeared immediately. He went on looking (with closed eyes, of course), and presently he thought he saw "something like a bird--something like an eagle." After a pause he said: "I thought I saw a figure there--I saw 5. The bird's gone. I see 5 again; now it's gone. The bird came twice." Mr Smith then came upstairs, and P. had another impression of an eagle. He was told that the eagle was right, and there was something else besides, no hint being given of what the other thing was. He then said that the first thing he saw "was a little bird--a sparrow, perhaps--he could not say--about the size of a sparrow; then that disappeared, and he saw the eagle. He had told Mrs Sidgwick so at the time." We see the mental machinery at work in another case, where the subject agreed upon was "The Babes in the Wood." To begin with, P. sat with closed eyes, but, when no impression came, Mr Smith opened his eyes, without speaking, and made him look for the picture on a card. After we had waited a little while in vain, Mr Smith said to him: "Do you see something like a straw hat?" P. assented to this, and then began to puzzle out something more: "A white apron, something dark--a child. It can't be another child, unless it's a boy--a boy and a girl--the boy to the right and the girl to the left. Little girl with white socks on and shoes with straps." Mr Smith asked: "What are they doing? Is it two children on a raft at sea?" P.: "No; it's like trees in the background--a copse or something. Like a fairy-story--like babes in a wood or something."