This site documents two exploratory surveys of the Barren Lands region west of Hudson Bay, in northern Manitoba and Saskatchewan and the area now known as Nunavut. Drawing on materials from the J.B. Tyrrell, James Tyrrell and related collections at the Thomas Fisher Rare Book Library, University of Toronto, it includes over 5,000 images from original field notebooks, correspondence, photographs, maps and published reports. In addition the site provides biographical information about the Tyrrell brothers and finding aids for the collections.