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In page Canning Stock Route:

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In the 1950s horses became scarce in the Kimberley as widespread losses were caused by "walkabout poison".[1] This led to the stock route being used to drove horses north from around the Norseman area where they were sold to the stations. Wally Dowling, a drover who had made nine droves along the stock route took what was probably the last group of horses northwards along the route in September 1951.[2] In 1968 the entire length of the track was driven for the first time by surveyors Russell Wenholz and David Chudleigh, and Noel Kealley.[citation needed]