The story opens aboard a steam yacht in Stockholm harbour during the 1912 Olympic Games, where Harry Luttrell’s strange behaviour hints at a secret. When war comes, Martin Hillyard runs agents against German submarine operations on the Spanish coast, and the summons of the title draws the two men together again amid traitors and smugglers in Barcelona.
A 1920 espionage novel by the author of The Four Feathers, drawing on his own wartime intelligence work in Spain. Download the free EPUB.