Contains journals and scrapbooks of Susan Martha Bayard Weir dated from January 1, 1875 to November 17, 1892. The first year of the journal was kept while lived at West Point and the remainder while she lived in New York City and Garrison, New York. It is a detailed daily journal recounting family events, business, visits, correspondence, achievements and relationships, as well as the social and cultural activities in which she and other family members were involved.

Contains the papers of various members of the Weir family, including Robert Walter Weir (1803-1889), John F. Weir (1841-1926), and Julian Alden Weir (1852-1919). Contains correspondence, diaries, scrapbooks, manuscripts, speeches, artwork, clippings, and published material relating to the family, dating from between 1765 to 1929. The bulk of the collection relates to Julian Alden Weir.