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Rh and stay there day after day—I know not for how long—without laying a second egg. If they do not do so, then none of these birds can have bred. But the ledges are alive with them, and they are of both sexes. How long does the mother bird remain with her chick upon the sea, and does she, during such period, remain with it there at night, thus abandoning the ledges for a time altogether, though she afterwards returns to them, or does she fly up each night to the ledges, whilst the chick roosts upon some rock at the cliff's base, to be rejoined by its mother next morning? I cannot answer these questions in a satisfactory manner. It seems as though time must be wanting for such a little family exodus as I am here suggesting, for on the 16th of July, upon the occasion of my first visit, I left these same ledges crowded with guillemots, all, or almost all, of whom were still feeding their young, and now, on the last day of the same month, I find all the old birds still upon them, but nearly all the young are gone. This gives about a fortnight for the birds I left to have gone off to sea with the young ones, and returned to the ledges alone, supposing the exodus to have commenced almost on the day I went away. But did it? As the few chicks that are still here are just about as big as the others were at the time I left them last year, I shall be better able to judge of this when I see how long they stay.

Meanwhile, there is something to interest me under my eyes—a curious matter as it seems to