Scope and Contents The collection consists of materials by or about John Chalmers Da Costa, MD (1863-1933), as well as some items relating to his wife, Mary Brick Da Costa and his cousin John C. Da Costa, Jr. Types of materials within the collection include addresses, medical journal articles (published), personal and family correspondence, notebooks, ephemera and certificates. While the addresses were mainly given at Jefferson Medical College, a few were presented at meetings of the Pennsylvania Medical Society...