Beauclerk served as a Captain in the 17th Lancers during the Boer War, returning to the United Kingdom in December 1901. During World War I he served as Aide-de-Camp to Field Marshal Douglas Haig.
In 1911 and 1913 he spent an extended period of time in British Columbia, Canada where he was involved in mining investment. Part of his time there was spent camping with partners British travelogue writer Warburton Pike and the American mining engineer Marshall Latham Bond. During his late eighties he spent a month traveling in the United States on a Greyhound unlimited travel pass.