Lincoln Keith Ingersoll was born June 30, 1914 at Grand Manan, N.B.. He married Ruby Cronk and had three children. After his military tour of duty as a dentist, he returned to Grand Manan and sought many professions. He became a teacher and Principal of the Grand Manan High School. During this time he wrote of the history of Grand Manan and was instrumental in fundraising and the creation of the Grand Manan Museum directly across the street from the school where it would always be easily accessible for Grand Manan students. He was a member of the Canadian Museum Association. He held the position as Curator, Dept. of Canadian History at the New Brunswick Museum from 1969-1972. Then he moved to Fredericton where he worked extensively on the Bicentennial Commission and other historically significant projects.
He was a prolific letter writer and kept much of his correspondence with the responses back and forth so the entire story would be preserved. His held many different offices and worked in various professions while on Grand Manan and in Fredericton, including: fish plant manager, bookkeeper; Canada Savings Bond Representative; Secretary, Grand Manan Telephone company, office of the High Sheriff, Justice of the Peace; Board of Health, sub-registrar, insurance salesman, political life, Conservative Party, military life (Dental Technician Class'41), principle Grand Manan High School, Grand Manan Museum curator, writer for Royal Canadian Geographic, newspaper correspondent for many local papers. Some of his volunteer interest included: Grand Manan Historical Society - president, Grand Manan Board of Trade - president, Canadian Legion of the British Empire Service League - secretary/treasurer, prospecting licence, Grand Manan High School Cadet School Leader, Boy Scouts Association leader, Genealogist and Biography writer, public speaker.
He gave lectures to many different groups for retiring school employees, public events, and specialty group functions. He was always promoting the history of Grand Manan and the importance of sharing that history with others through education and preservation. He wrote manuals and policy documents to assist with the development of these organizations. His work was recognized across the country and he gave speeches across Canada to Annual Meetings of Provincial-level organizations. Through these many careers and adventures L. Keith Ingersoll received many awards and recognition. Shortly before his death he was notified that he was the recipient of the Order of Canada. Sadly he did not live to accept this honour personally, and his son Granville, accepted the medal at the ceremonies in Ottawa. He died December 16, 1993 in Fredericton, NB. There is a large display in his memory at the Grand Manan Museum.