Fonds comprises editorial reports and notes made by Jefferys on works by Thomas Chandler Haliburton. Also included is a letter from Robert Glasgow, Managing Director of The Publishers Association of Canada, outlining the agreement of editorial and illustration work undertaken by Jefferys on a multi-volume series of the works of Haliburton. In addition, there is a typescript of a talk written by Jeffreys regarding his illustrations for the project.
Series contains records related to published books including Abraham Gesner, Anna's Pet, George Dawson: The Little Giant, The Pit Pony, The Purple Cloak, The Smallest Rabbit, The Witch of Port LaJoye, The Lost Ship, and The Story of Little Martin. Types of records included here are drafts, galleys, published books, research materials, sketches, and audio-visual materials relating to published works.