When he was about 19 years of age, Rosenbaum left his native land for America, travelling first to Hamburg by rail, then in a sailing ship to America. The trip took 74 days. The ship's register shows that on 8 Aug 1850 the sailing ship Ellen arrived from Hamburg with 67 people on board. One of those was M. Rosenbaum Clerk age 19. The original is easier to read on a microfilm reader. It can be found on FHL film #175447.