This series consists of personal correspondence from Robb to E.V. "Violet" Birdseye, later Mrs. Percival Merritt, correspondence with Elsie Lawler, and other nursing figures including Florence Nightingale. Some letters are the original handwritten copies, while others are transcriptions or photostatic copies. The photostatic copies were processed as part of the Alumni Association's efforts to publish a history book. The series also contains correspondence from other members of the Robb family.
Some letters were given to Alan Mason Chesney, and others came to the Archives as part of the Nightingale room accession.