I come now to speak of another feature which interested me nearly, if not quite, as much as any other characteristic of this creature, and that is their fashion of slumber. The sleep of the fur-seal, seen on land, from the old male down to the youngest, is always accompanied by an involuntary, nervous, muscular twitching and slight shifting of the flippers, together with ever and anon quivering and uneasy rollings of the body, accompanied by a quick folding anew of the fore flippers; all of which may be signs, as it were, in fact, of their simply having nightmares, or of sporting, in a visionary way, far off in some dreamland sea. But, it may be that as an old nurse said in reference to the smiles on a sleeping child’s face, they are disturbed by their intestinal parasites. I have studied hundreds of such somnolent examples. Stealing softly up so closely that I could lay my hand upon them from the point where I was sitting, did I wish to, and watching the sleeping seals, I have always found their sleep to be of this nervous description. The respiration is short and rapid, but with no breathing (unless the ear is brought very close). The quivering, heaving of the flanks only indicates the action of the lungs. I have frequently thought that I had succeeded in finding a snoring seal, especially among the pups; but a close examination always gave some abnormal reason for it—generally a slight distemper; never anything more severe, however, than some trifle by which the nostrils were stopped to a greater or less degree. The cows on the rookeries sleep a great deal, but the bulls have the veriest cat-naps that can be imagined. I never could time the slumber of any old male on the breeding grounds which lasted, without interruption, longer than five minutes, day or night. While away from these places, however, I have known them to lie sleeping in the manner I have described, broken by such fitful, nervous, dreamy starts, yet without opening the eyes, for an hour or so at a time.