The art collection of the State Pushkin Museum features a portrait of Leonty Vasilyevich Dubelt. Dubelt was a participant in the Patriotic War of 1812 and until 1822 served as adjutant to Nikolay Nikolayevich Raevsky Sr., the senior staff officer of the Corps of Gendarmes.

In his memoirs, Herzen described Dubelt as follows,

In his role as an assistant to Alexander von Benckendorff, Dubelt communicated with Alexander Pushkin. After the poet’s death, Dubelt and Zhukovsky worked together to organize and preserve his archive. Leonty Dubelt kept a detailed journal documenting and organizing Pushkin’s documents, letters, and manuscripts. Following the completion of this work that took 15 days, Dubelt prepared a final inventory of the materials, one copy of which was kept by Zhukovsky and the other was presented to Emperor Nicholas I by Benckendorff in 1837. In 1853, Pushkin’s daughter, Natalia, married Leonty Dubelt’s son, Mikhail (1822–1900), who was a lieutenant colonel in the infantry.