Read the excerpt. which detail introduces the central idea that the two cyclists might be related? (14) "left nothing behind, i hope," said the other, glancing back. "hullo! there's a letter tumbled out of somebody's pocket in the stramash--yours or mine?" (15) it lay address upwards between them, and the taller of the two with a brief "mine," picked it up and put it in his pocket. his companion stared at him. (16) "look here," he said, holding out his hand. "you've made a mistake--that letter belongs to me--i'm edward cruttenden." (17) it was the other's turn to stare. "the deuce you are! why!--my name is edward cruttenden!" (18) they stood thus staring at each other with a sudden dim sense of their own similarity, until the shorter of the two shook his head whimsically. (19) "this is confusing," he remarked in a tone of argument. "let's sit down and have a pipe over it--we shall have to differentiate ourselves before we start out into the world together."...