Pyotr Filippovich Yakubovich was a Russian revolutionary, poet and member of Narodnaya Volya during the 1880s. He graduated from the Faculty of History and Philology of Petersburg University. After graduating, he entered the Petersburg Department of Narodnaya Volya. He was an organizer of the "Young People's Will Party" as well as its leader and ideologist.
From the age of 24, he spent many years of his life in prisons and katorga. He spent three years in the Peter-Paul Fortress for participation in political movements and was subjected to penal servitude in Siberia from 1887 to 1899.
He published in 1895 — under the pseudonym L. Melshin — a series of essays life for the prisoners in Siberia: V Mire Otverzjennych, and Pasynki zhizni.
According to an article on Leon Trotsky by David North "His poems, which evoked the heroism and tragedy of the doomed struggle of the revolutionary terrorists against tsarism, made a deep moral impact upon the youth of the 1890s."