Henry Helsham-Jones grew up in Suffolk and joined the Royal Engineers in 1855. After two years in Gibraltar, Helsham-Jones was posted to India in 1867, where he remained, despite the death of his first wife, until 1878. After four years in England, he was posted to Egypt. He returned to England later that year and was based at Aldershot before a final posting to Malta in 1888. He retired in 1889 and settled in Surrey.
Evan Glyndwr Jones was a student at Bristol University.
Jonathan Rhys-Lewis is a self-employed, preservation and collections care consultant with over 35 years experience both within local government and as self-employed consultant. He is a professionally qualified archive conservator and an accredited member of the Institute of Conservation. He works with organisations to offer specialist advice on the preservation management of paper-based materials in heritage collections. (Information taken from his website: https://www.jonathanrhys-lewis.co.uk/about.php.)