I believe, said Austerlitz, they know they have lost their way, since if you do not put them out again carefully they will stay where they are, never moving, until the last bath is out of their bodies, and indeed they will remain in the place where they came to grief even after death, held fast by the tiny claws that stiffened in their last agony,until a draft of air detaches them and blows them into a dusty corner.