The Red Triangle : Being Some Further Chronicles of Martin Hewitt, Investigator - Morrison, Arthur, 1863-1945 (Project Gutenberg, 2009)
The affair of Samuel's diamonds -- The case of Mr. Jacob Mason -- The case of the Lever Key -- The case of the burnt barn -- The case of the Admiralty code -- The adventure of Channel Marsh.
Electronic text
Keywords: Private investigators -- Fiction; Detective and mystery stories, English