Sergey Prokudin-Gorsky
Sergey Mikhaylovich Prokudin-Gorsky (, ;  – September 27, 1944) was a Russian chemist and photographer. He is best known for his pioneering work in colour photography and his effort to document early 20th-century Russia.
Sidney Reilly
On 30 August, Boris Savinkov and Maximilian Filonenko ordered a military cadet named Leonid Kannegisser—Filonenko's cousin—to shoot and kill Moisei Uritsky, head of the Petrograd Cheka. Uritsky had been the second most powerful man in the city after Grigory Zinoviev, the leader of the Petrograd Soviet, and his murder was seen as a blow to both the Cheka and the entire Bolshevik leadership. After killing Uritsky, a panicked Kannegisser sought refuge either at the English Club or at the British mission where Cromie resided and where Savinkov and Filonenko may have been temporarily in hiding. Regardless of whether he fled to the English Club or to the British consulate, Kannegisser was compelled to leave the premises. After donning a long overcoat, he fled into the city streets where he was apprehended by Red Guards after a violent shootout.