The fonds consists of the diaries of Harriet Pengelley (1835-1836), Robert Pengelley (1835), and A.E. Marguerite (Rita) Pengelley (1940-1941); correspondence; sketchbooks (1829-1830); drawings; and photographs. In 1994, an addition was made to the fonds which included a photocopy of a diary of Robert Pengelley (1837-1840) and textual records regarding the Pengelley family. In 2018, an addition of Pengelley family genealogical information was received.

This fonds consists of records relating to the professional and personal lives of Dr. Henry Turner (Sr.) and Dr. Henry A. Turner (Jr.), both medical doctors of the Millbrook area. The medical publications, prescription day books, office records, customer account books, transaction day books, stock books, business and domestic records and invoices, glass x-rays, and correspondence depict the lives of each man respectively, spanning the years 1872 to 1936. Also included are personal and business-related records of Alice Turner, nurse, daughter of H.A. Turner (Sr.). A Farmers and Business Directory for Peterborough and the United Counties has been catalogued and removed to the Trent Collection.

The grasses scrapbook was compiled by Catharine Parr Traill for her friend James Fletcher and given to him 12 January 1894. The inside cover has the following inscriptions: "Grasses from Stony Lake gathered and mounted by Cathe Parr Traill - Aged 92 years." These specimens are from the Island of Minne Wa-Wa and Otter Island. July-September 1893" and "With Mrs.Traill's kind wishes to her much valued and esteemed friend James Fletcher F.S.L.S. & etc. January 12th, 1894". The scrapbook consists of 20 pages, 18 of which have pressed grasses, from the Stoney Lake area of the Island of Minne Wa-Wa and Otter Island, glued onto them. Also included in the scrapbook is a specimen list of the grasses and a photocopy of an article, entitled "Grasses from Stony Lake Gathered and Mounted by Cathe Parr Traill - Aged 92 Years". The article was written by William G. Dore and published in The Ontario Naturalist in 1966.

The framed mosses were gathered by Catharine Parr Traill in the Stoney Lake area. Prior to the Archives receiving this addition, the pages were taken apart, mounted and framed in two frames each containing three pages of mosses; one medium frame containing "Sedges & grass, with mosses, from the bank below the garden at Westove. Gathered and arranged for Katie. With Grandmother's dear love. Oct. 24th, 1889"; and one small frame with Traill's autograph.