spotted

“‘Swim out, my fine fellow,’ cried my grandfather, ‘and see if the water has spotted your clothes.’ Quelala was much too wise not to swim, and he was not in the least spoiled by all his good fortune.

He had spotted the place.

I left him an excellent mark in the window, and, having warned the police that they might be needed—by the way, Watson, you spotted their presence in that doorway with unerring accuracy—I took up what seemed to me to be a judicious post for observation, never dreaming that he would choose the same spot for his attack.

Next instant I spotted a boot under the window curtain, and then I saw why plain enough.