The author calls attention to the fact that Lenart Mravlja, a printer’s apprentice from Carniola and Leonhard Formica (1588—1605) is one and the same person. Mravlja took part in the printer’s workshop, when Slovene and Croatian Protestant books were printed by baron Ungnad at Urach and later on at Regensburg, and between 1575—1584 in Ljubljana. He also helped when the Slovene translation of the Bible by Jurij Dalmatin was printed in Wittemberg in 1583.