How did Jacob Burckhardt earn a living before becoming a university professor?

Before establishing himself as a university professor, Jacob Burckhardt earned his living by working as the editor of the Basler Zeitung, a conservative daily newspaper, for two years following his return to Basel in 1843.1

While he was authorized to give private lectures at the University of Basel during this period, his primary income came from his editorial role. Later, in 1846–1847, he also collaborated with his teacher Franz Kugler to prepare updated editions of Kugler's textbooks on art history, further contributing to his professional activities before his academic career became his sole focus.1