Mary Sorrel and General Rennenkampf'.

Paul von Rennenkampf (or Pavel Karlovich Rennenkampf) (April 17, 1854 - 1 April 1918) was a Russian general who served in the Imperial Russian Army for over 40 years, including during World War I. At the start of World War I, Rennenkampf was given command of the Russian First Army for the invasion of East Prussia. Failure at the First Battle of the Masurian Lakes that same month, which forced a Russian withdrawal from East Prussia, and at the Battle of Lodz in November 1914, led to Rennenkampf's dismissal amid recriminations of incompetence and even treason (due to his heritage). Rennenkampf gave his resignation on October 6, 1915. He was executed by the Bolsheviks after refusing to serve in their army. 'Mary Sorrrel', known as 'Polish Mary'. The author claims to have encountered her a few times and at first thought she was a spy for the allies. He was informed she was spy for the Germans and had established a friendship with General Rennenkampf. He last saw her disguised as a Russian soldier, and later heard that she had been captured and executed by the Russians after trying to infiltrate their headquarters. Steinhauer, the Kaiser's Master Spy. The story as told by himself. Edited by S. T. Felstead, etc. [With plates, including portraits.] Author: Steinhauer, Gustav / London: John Lane, 1930 Source/Shelfmark: 010705.i.35 plate opposite page 170