sentences:  The initial collection was an effort to gather the writings of Protestant reformer Caspar Schwenckfeld von Ossig (1489–1561).This collection of writings resulted in the Corpus Schwenckfeldianorum (1907–1961), a nineteen-volume body of work containing Schwenckfeld's letters and books.The collection expanded after 1913, after it was housed in the Carnegie Library, part of Perkiomen Seminary.