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Over the Barren Grounds : the Tyrrell brothers explore an unknown territory
In a great unknown land : exploration in the 'Barren Ground' of the West
Letter to J.B. Tyrrell, 1893/02/23
Letter to J.B. Tyrrell, 1893/03/07
The Barren Lands : the Tyrrell brothers' interesting trip of exploration
The Barren Lands : Lieut. Joseph Tyrrell gives an account of his explorations