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120 cliff, but keeping, for the most part, within the middle space between the two. Ever and anon it sails smoothly in to its own rocky ledge, pauses above it, as though to think "My home!" then, with another quick shimmer or flicker of the thin shadow-wings, sweeps smoothly out again, to enter once more on those wonderful down-sliding, up-gliding circles that have more of magic in them, and are more drawn to charm, than had ever a necromancer's.

This light flickering of the wings, as I have called it, for they cannot be said to flap or beat—even quiver is too gross a term for so delicate a motion—is a characteristic part of the fulmar petrel's flight. They move for a moment—for a few seconds more or less—in the way in which a shadow flickers on the wall, and then the bird glides and circles, holding them outspread and at rest, opposing their thin, flat surface, now to this point, now to that, by a turn of the head or body, but giving them no independent motion. Then another flicker, and again the gliding and circling. When spread thus, flat to the air, the wings have a very thin, paper-knifey appearance. The simile does not seem worthy either of them or of the bird, but as it is continually brought to my mind, I must employ it, albeit apologetically. It is the shape of them that suggests it. Their ends are smooth and rounded, and they are held so straight that they seem