Born in Botoșani, his parents were the poet Artur Stavri, whose name does not appear on his son's birth or death certificates, and the folklorist Elena Didia Odorica Sevastos.
Between 1902 and 1910, he studied at the city's Costache Negruzzi Boarding High School, passing through the lower and then upper divisions, classical section.
Sevastos' contributions appeared in Cuvântul liber, Convorbiri Critice, Facla, Mișcarea, Rampa, Lumea, Lumea literară și artistică, Cronica, Adevărul, Dreptatea, Flacăra, Însemnări literate, Dimineața, Seara and Opinia.
Among the authors he translated are Anton Chekhov, Alexander Serafimovich, Mikhail Sholokhov, Leo Tolstoy, Ivan Turgenev and Gleb Uspensky.
[1] His novels were Aventurile din strada Grădinilor (1934) and Camioneta verde (1938), along with Documente omenești, which appeared posthumously in 1970.