Not many records survived from the presidency of Dr. Sylwester. Extant records include correspondence from 1924-1937 (predominantly with Synodical officials), various office documents, documents relating to his career (including some correspondence), records of his campus trees project, and various biographical items (especially from his 50th anniversary as a professor [1955] and 90th birthday [1971] celebrations). The collection also includes several histories of the Sylwester family, especially in relation to Concordia University.