Thomas Guthrie Marquis was a Canadian historian. Marquis was born in Chatham, New Brunswick. His parents were Hugh P. Marquis and Mary McIndoe. His father worked in the shipbuilding sector. He went to school at Chatham until the age of 16, when he transferred to Queen's University in Kingston, where he graduated in 1889. He became a teacher, but he retired in 1901 to dedicate his time to literature. He temporarily worked as an editorial writer for the Ottawa Free Press before moving to Toronto and working as a freelance writer. He was the office editor of Canada and Its Provinces (1914-15), a 22-volume compilation of Canadian history.