Harry was born in Wolverhampton in 1882, the son of Albert William Pendrey. By 1901 he was a boarder in the home of William Owen at 24 Little Chapel Street, Wolverhampton. Harry was a horse shoeing smith.
On 9 May 1901, he joined the Royal Army Medical Corps (number 15673). He faced various disciplinary actions during the course of his service, for neglect of duty, using improper language, and being absent from parade. After serving in South Africa, he was transferred to the Army Reserve in 1904. He married Florence Emily V. F. Hill in Wolverhampton in 1905, and in 1911 they were living at 150 Wolverhampton Road, Heath Town, Wolverhampton with their son, Harry Albert. Harry was now a steel mould strike for an edge tool works. The couple had a son, Richard G. M., in Wolverhampton in 1914.
Harry enlisted in the 7th Service Battalion of the South Staffordshire Regiment (number 10108). He first served in the Balkans from 21 July 1915, but died of wounds in Gallipoli on 9 August 1915. He is remembered at the Helles Memorial in Turkey.