Complex sentence: He had to work even while attending high school due to his fathers early passing, and in 1873, a year prior to finishing his law degree, Józef applied to the Directors of the Lwów postal service.
Split into simpler sentences: He had to work even while attending high school due to his father's death. In 1873, a year prior to finishing his law degree, Józef applied to the Directors of the Lwów postal service.