"Memoir and Journal of An Expedition Organized by The Colonial Government of Western Australia for The Purpose of The Interior of The Colony Eastward of The District York" is a complete title of the memoir written by the British-Australian explorer Henry Maxwell Lefroy. Lefroy and his companion Landor completed the second expedition to the Australian Goldfields in 1863, where the party passed through areas such as Bruce Rock, Dumbleyung, and Coolgardie. The company trekked for a total of 85 days, including four days with no water, before returning to York. Lake Lefroy was named after Lefroy, who would have seen the lake during his visit.