This fonds consists of records encompasing three generations of the Boyd family of Bobcaygeon. The fonds has been divided into the following series: photographs and glass negatives; Reverend Henry C. Avant; Mossom Boyd; Mossom Martin Boyd (Mossie); Lillian de Grassi Boyd; the De Grassi papers which are records of Dr. Alex De Grassi, Lillian Boyd's father, a physician from Lindsay, Upper Canada; Gardiner Cust Boyd; Mildred Boyd; Winnett (Brownie) Boyd; Laurence Chadwick Boyd; Mossom de Grassi Boyd; A. Sheila Boyd; stamps; artifacts; business which deals with the Boyds interests in lumbering; agricultural papers which deal with the Boyd's farming interests in buffalo and cattle; and, estate papers. The strength of this fonds lies in its completeness. Nothing was thrown away and there are grocery lists, laundry lists, staff salary books, furniture receipts, party and wedding invitations, school report cards, ship and railway timetables, diaries and approximately 20,000 pieces of correspondence. This has resulted in a remarkable record of a large household from the 1880s to the 1980s and an invaluable source for social and business historians.

Collection consists of nine Boyd family photograph albums, 14 glass plate negatives, and several strip negatives. The images depict the lives and activities of the Boyd family of Bobcaygeon, Ontario, and include lumbering scenes, Trent Canal steamboats, buffalo/Hereford animals, and travel excursions. Also included are three "Gypsy" photographs (Peterborough, 1909), and photographs of winter sporting activities. Several photographs depict family members; many are unidentified. Also included in this collection are copies of the wills of WT.C. Boyd and Mossom Boyd.

This fonds consists of photocopies of 43 interview transcripts of residents of the Trent Valley area. The interviews were conducted by Daniel Francis under contract, in 1979, to Parks Canada and focus on such themes as transportation, commerce, settlement, tourism, and resource development. They relate to the section of the Trent-Severn waterway stretching from the mouth of the Otonabee River to Bobcaygeon.

Fonds consists of 27 diaries of William Thornton Cust Boyd dated 1878 through 1917. Five of the diaries, 1884-1888, include financial records. The diaries recount the private and public life of Boyd, and include references to his wife, Meta, and their children, and social activities with family and friends including boating excursions and picnics. He refers throughout to Richard Birdsall Rogers (1857-1927), superintending engineer of the Peterborough Lift Lock, in social and business terms, and the two often conduct business relating to the Trent Valley Canal. Activities which Boyd participated in regularly include yachting and boating (on the "Calumet", "Ogemah", and "Ajax"), curling, hunting, gardening, tree planting, playing cards, skating, canoeing, and attending the theatre. He recounts details of the illnesses, deaths and funerals of acquaintances and family members, including his step-brother, Mossom (Mossie) Martin Boyd. Boyd recounts in detail the building of his house by John E. Belcher ([184-]-1915), architect, civil engineer, and surveyor. This house is now operated as Case Manor Nursing Home. The diaries speak of local and federal politics, World War I, and the activities of the church. They also detail the activities of the Lindsay, Bobcaygeon and Pontypool Railway Company, the Trent Valley Navigation Steamship Company, and the day-to-day operation of the family lumbering and cattle/buffalo enterprises.