The Scottish natural philosopher David Brewster played an important role in the history of the Royal Society of Edinburgh (RSE), being at different times its general secretary, vice-president, and president. This paper examines his career between joining the society in 1808 and becoming principal of the University of St Andrews in 1838. It explores how he built a network of scientific and personal connections with key individuals in Scottish science that helped him establish himself as a leading Scottish natural philosopher of the nineteenth century. The surviving records of the RSE allow us to see how Brewster used recommendations of new members and his own contributions to the meetings of the society to build his reputation. Brewster was ...