saying that he has just returned from a small lecturing tour and got your note... Many thanks for your kind invitation. I am disengaged on Monday 10th and will come with great pleasure..., 1 side 8vo., 13 Grove Gardens, N.W., 6th March
He was known in the 19th century London revolutionary circles as Sergius Stepniak. He was a Ukrainian revolutionary mainly known for assassinating General Nikolai Mezentsov, the chief of Russia's Gendarme corps and the head of the country's secret police, with a dagger in the streets of St Petersburg in 1878. Stepniak died in suspicious circumstances, falling under the wheels of a train at a railway crossing at Chiswick, where he lived at the time.