The Gerlough Family Papers span the years 1900 to 1968. Most of the papers are letters dating from 1911 to 1914. Also included are financial records from the same period, other papers, and photographs.

The letters—many still in their envelopes—were written between Margaret Lauder and Ludwig Gerlough while Gerlough was a student at Oxford University and Lauder taught school at Moscow High School and elsewhere. The letters are about family matters; some also contain discussions of local and national politics, teaching at secondary schools in Idaho and Washington, Gerlough's work at Oxford, his extensive travels in Europe, letters of recommendation written for Lauder, and Gerlough's fraternity correspondence. Other correspondence includes letters written to Lauder and Gerlough from family members and friends.

The financial records consist of Gerlough's checkbook registers from an Oxford bank and bills from various Oxford businesses, dated between 1911 and 1914.

Other papers include unsigned postcards, cards, announcements, maps, and newspaper clippings. Two yearbooks were retained in the collection: Margaret Lauder's 1906 University of Idaho Gem of the Mountains and Eleanor Gerlough's 1935 Madrono yearbook from Palo Alto High School.

Included in the papers were two photograph albums, primarily of Gerlough's days at Oxford, but also many photographs of family and friends. There were also several loose photographs that were stored in acid-free envelopes, and three oversize photographs stored separately.

Special Collections also has an unpublished manuscript written by Ludwig Gerlough about his life at Oxford (MG 5096). Lauder's uncle Wylie Andrew Gifford Lauder (1857-1936) donated his financial records to the University of Idaho Library (MG 210), and her cousin Alma Taylor-Lauder Keeling wrote a family history called The Un-Covered Wagon, A Glimpse of Pioneer Days in Moscow (Day NW F754 M6 K44) also housed in Special Collections.