BOOK 4 in the Wallace of the Secret Service series

Sir Leonard Wallace, the famous chief of the Secret Service, finds that the peace of Europe is threatened by a gang engaged in the theft and sale of national secrets. Wallace gets busy, and is assisted by the gang leader's own fear of him and his anxiety to get the Englishman into his power.

Wallace's investigations, his startling discoveries and his escapes from death make this one of the most exciting books ever written by Alexander Wilson.