This series comprises the minute books of the club since its origins in 1880 until 1970, as well as some accounts/financial records in volumes and/or loose notes.

The minute books include the date and location of meetings, names of guests and members in attendance (ordinary and honorary), titles and details of papers read, accounts of discussions and elections, and details of arrangements made for social activities and excursions. Many of the minute books from the 1920s include printed cards listing the talks and speakers for the entire academic term. Some volumes include letters from members or their families.

The Sedgwick Club Archive contains administrative documents including minute books, 1880-1926; financial records, 1880-1989; handwritten copies of papers given at meetings, 1880-; excursion scrapbooks, 1882 to 1950; social events records including menu cards; copies of club photographs 1900-1974 [NB: a full set of club photographs are on display in Cambridge University Department of Earth Sciences] and digitized copies of all group photographs [until 2016].