L. V. Dubbelt

Leontiy Vasilievich Dubbelt was a Russian soldier and subsequently a police-chief under Emperor Nicholas I. Dubelt fought against the Grande Armée at the Battle of Borodino in 1812 and briefly came under suspicion of involvement in the Decembrist conspiracy of 1825. Colonel Dubelt resigned from the Imperial Russian Army in 1828 and joined the Corps of Gendarmes
- the Russian Empire's uniformed security police.
He held senior rank from 1839 to 1856 in the feared Third Section and largely specialised in censorship.
In the course of his career he took part in secret-service cases involving writers and intellectuals
such as Pushkin,
Lermontov,
Saltykov-Shchedrin
and Turgenev.