The Man Who Knew by Fred M. White

FOR the moment, at any rate, it was not Lashbrook's intention to say anything about the discovery of those gold marks in Martin lane. All he wanted to know was whether or not Mary had had any letters, or could recollect any letters, that her father had written from Italy, either just previous to the war, or during the course of hostilities.

"Now, let me see if I can remember," Mary said. "I did have letter from my father occasionally when he was away on his mysterious journeys. But they were few and far between, and never with addresses on them. For some reason best known to himself, he did not desire that I should write to him at any particular place. If anything extraordinary transpired, then I was to write to him and address my letters through the medium of some mysterious agents in London--Box something or another, you know what I mean."