Here he published his memoirs concerning the fall of Formosa in German. In translation it appeared in Amsterdam in 1670, and again in 1671 (together with the journals of Johann Jacob Saar and Volkert Evertzs). especially noteworthy are his illustrations in this book. In 1680 he became a member of the 'Grosse Rat'. From then on he made his career in the service of Bern as officer, city counsellor and baillif