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Rh acted in something the same way that a bereaved mother may be supposed to, when she almost unconsciously lays out clothes or goes through some other once habitual process, in behalf of a dead child—forgetful, for a moment, or half-forgetful, of the change. All would have been brought about through association of ideas, one appropriate act suggesting and leading to others no longer so, but of whose propriety or otherwise the bird—or any animal—has probably but one means of judging—the presence or absence, namely, of the idea of them in its mind.

Now when, as Miss Kingsley tells us, a negro, chatting in his hut, turns with a smile or a remark, to his mother—deceased, but whom he supposes to be sitting in the accustomed place there—may not this also be through association of ideas, producing a strong visual image of what he has so long been used to see? There is hardly anything that so readily summons up the image, with the remembrance, of the dead, as the place where they lived or the objects amongst which they moved. How much, for instance, does the familiar chair suggest the presence of some one who used habitually to sit in it. "I know," says Darwin—referring to a visit to his old home after his father's death, which had occurred during his absence on the famous voyage—"I know if I could have been left alone in that greenhouse for five minutes, I should have been able to see my father in his wheel-chair as vividly as if he