Lev Kassil was born on July 10, 1905 in Pokrovskaya sloboda, Saratov Governorate, Russian Empire [now Engels, Saratov Oblast, Russia]. He was a writer, known for
Vratar (1936),
Theft of Sight (1934) and
Konduit (1936). He was married to Elena Iljinichna Cassil and Swetlana Leonidovna Sobinova. He died on June 21, 1970 in Moscow, Russian SFSR, USSR [now Russia].