From 1564 he lived in Braunsberg (then in Royal Prussia; present-day Braniewo) where he was professor of grammar in the biggest Polish Jesuit collegium (where teaching was in Latin) and a novice master.
Due to these problems he was permitted to leave Poland in 1580, when he met the Scottish king for the first time.
During the journey to Scotland in 1580 and during his second stay there he was organizing transports of Scottish Catholic novices to be trained in Polish schools and seminaries.
[1][2] Abercromby claimed that he had reconciled Anne of Denmark, queen of James VI of Scotland, to the Catholic Church.
His name was connected to the allegiance oath controversy when a pamphlet "pasquil", Exetasis epistolæ nomine regis, written under the pseudonym Bartholus Pacenius against James I was traced to Braunsberg;[4] but the investigation by Patrick Gordon was inconclusive.