Milton and Cheadle travelled through the Yellowhead Pass in 1863.
- Dower, John. The western portion of British North America, showing the route followed by Lord Milton & Dr. Cheadle, from the Saskatchewan to British Columbia, 1863-4. 1864. University of British Columbia Library
- Milton, William Wentworth Fitzwilliam [1839–1877], and Cheadle, Walter Butler [1835–1910]. The North-West Passage by Land. Being the narrative of an expedition from the Atlantic to the Pacific, undertaken with the view of exploring a route across the continent to British Columbia through British territory, by one of the northern passes in the Rocky Mountains. London: Cassell, Petter and Galpin, 1865. Internet Archive
- Milton, William Wentworth Fitzwilliam [1839–1877], and Cheadle, Walter Butler [1835–1910]. Voyage de l’Atlantique au Pacifique, à travers le Canada, les montagnes Rocheuses et la Colombie anglaise. Paris: Hachette, 1872. Internet Archive