Messages passed between Susan and Barney Stockdale

“Your letter to me had the 10 P.M. postmark. And yet Susan passes the word to Barney. Barney has time to go to his employer and get instructions; he or she — I incline to the latter from Susan’s grin when she thought I had blundered — forms a plan. Black Steve is called in, and I am warned off by eleven o’clock next morning.” (Sherlock Holmes)