Vultures probably have their beats high overhead in the sky, too far to be seen by the eye.

From this altitude they can watch a vast tract of country, and whenever the disturbed movements of game are observed they draw together, and for the first time are seen wheeling, about at a great height over the spot.

So soon as an animal is killed, every tree is filled with them, but the hunter has only to cover the meat with boughs or reeds and the vultures are entirely at a loss--hidden, from view it is hidden altogether: the idea that they are attracted by their keen sense of smell is altogether erroneous,--ED.
[48] These letters reached England safely.
[49] It seems almost too ridiculous to believe that we have here the exact equivalent of the schoolboy's demonstrative "Do you see any green in my eye ?" nevertheless it looks wonderfully like it!--ED..