I have found him listed on the roll now [You must be registered and logged in to see this image.]James Douglas Marshall
He proceeded to Natal with Detachments in February 1879, and served with the Field Force and on the lines of Communication till the conclusion of the war.
He arrived at Durban on Sunday 30th of March aboard the ship ‘Tamar’ after the ‘City of Paris’ had run aground entering Simon’s Bay on 23rd March. The ‘City of Paris’ left Queenstown on the 21st of February, and also called at St Vincent which it left on the 5th of March.
Date of Birth - 21st February 1847
Rank Service - 10 years 68 days
Lieutenant of Orderlies - 9th June 1877
Quartermaster - 1st July 1881
South African War - 1879 - Zulu Campaign. Medal.
Egyptian Expedition - 1882 - Medal with clasp; bronze star.
So it looks like a typing error in the BMJ article.