out the throat and rolling the head at one another, the while, in the way I have described—I was so foolish as to think that this was the cry that I thought so wonderful, but not at its best, and that the real one, when I heard it again in the distance—for, as I say, it never sounded very near—was the same one at its best. With this false idea in my head I went home, and when somebody, assuming the character of a "Fulmar Petrel" himself—assured me that I had mistaken the guillemot's note for his own, I was as convinced that he did not know what he was talking about, and that I did, as I am now to the contrary.
On one point, however, I am clear, and cannot possibly be mistaken, since I have verified it only in these last few days, having come, in fact, partly to do so—at least that made another motive for my journey. The fulmar petrel, if it does not bray like a guillemot, has at least a nuptial note—and that a sufficiently striking one—of its own, which is uttered by both sexes as they lie on the rock, but never, in my experience, whilst flying. Moreover, just as the vocal powers of the guillemot are now marvellously increased—or rather multiplied—compared with what they were some weeks earlier in the year, on my last visit, so, if I may trust my own memory—which, however, I never do trust—those of the fulmar petrel have suffered a corresponding diminution. I attribute both these facts to one and the same cause. At the earlier date the guillemots were in the very midst of their domestic duties, so that those feelings
