Besides, I think I can uncover almost any shadow.

All you have to do, if you think you're being shadowed, is to turn a corner and stop.

That uncovers the shadow as soon as he comes up to the corner, and after that he is useless.

You know him." "That's all right," nodded Constance; "but you don't know these crooked detectives nowadays as I do.

They can fake up evidence to order.