The Katharine Byrd Breyer vs. Richard E. Byrd III Lawsuit Papers consist of correspondence, clippings, financial records, and other legal documents regarding the lawsuit brought by Admiral Richard E. Byrd, Jr.'s daughter Katharine Byrd Breyer against her brother, Richard E. Byrd III (Dickie). The lawsuit involved the estate of Marie A. Byrd, their mother. Materials date from 1953-1989.

The Katharine Byrd and Robert G. Breyer Family Papers on Richard E. Byrd contain correspondence, plaques, a scrapbook, clippings, photographs, programs, digital media and other documents related to Katharine Byrd Breyer and her husband Robert G. Breyer's participation in programs honoring Katharine's father, Admiral Richard E. Byrd. The materials mainly relate to posthumous building, ship, and monument dedications, and other ceremonies honoring Richard E. Byrd from locations around the world, including a significant dedication in Wellington, New Zealand, on the fifth anniversary of Byrd's death in 1962. The collection also has a few items dated before Richard E. Byrd's death, including some correspondence sent from Byrd to Katharine and Robert, and one 2007 clipping on Richard E. Byrd collected by Robert G. and Katharine's son, Robert Byrd Breyer. The materials are dated 1938-circa 2000s.