After completion of his schooling, Ritter was introduced to Bethmann Hollweg, a banker in Frankfurt. It was arranged that Ritter should become tutor to Hollweg's children, but that in the meantime he should attend the University of Halle at his patron's expense. His duties as tutor began in 1798 and continued for fifteen years. The years 1814–1819, which he spent at Göttingen in order still to watch over his pupils, were those in which he began to exclusively study geography. It was there that he courted and married Lilli Kramer, from Duderstadt and that he wrote and published the first two volumes of his Erdkunde.