The article supplements a biography of the Jagiellonian court physician - Maciej of Krajna, of Hatchet coat of arms, also called Fox, which appeared in the eighteenth volume of 'Podlasie Studies '. A document, which has been unknown until now, issued in 1536, under which the king Sigmund Old deprived Maciej of services that he had been awarded with in 1524 (Szamolky and Sczohlowsczyna) and conferred him with the new ones in exchange (Brykowszczyzna and Rogaczyna), which covered the same rights and immunities, appeared in print in the 19th book of the Lithuanian Metrica' notes. The content of this document compels us to change a date of the Strabla court and estates foundation to the years between 1536 and 1555. What is more, a new privilege contained a clause allowing free transport of goods across the Narew river. Exercising this right, Maciej of Krajna erected a bridge across the river which was used by his descendants. It was mentioned for the first time in 1577 when Benigna Dziadkowska complained before the court that Maciej's grandson, Feliks Arciechowski did not look after the passage in his possession. The Szamolky service, which the court physician was deprived of in 1536 and which is identified as a contemporary village Samulki, was conferred to provostry in Bielsk Podlaski as part of compensation for the lands lost during the 1560 Wallach reform of the city of Bielsk.