Arthur J. Rees, The Mystery of the Downs
“ He sent me a letter.”“And since when have you begun to place implicit faith in anonymous letters, my dear Gillett?”The detective flushed under this gentle irony. “I don’t place implicit faith in it. But it fits in with other information in our possession. And you ought to know better than to despise anonymous information, Mr. Crewe. It is not difficult to conceive circumstances in which a man is willing to give the police very valuable information, but will not come into the open to do it.” ”
