This is the index of the Deaths recorded by the British Army in this period, they relate to a series of Death Certificates available through the ONS (familiar to any Genealogist) and are orderable through that organization. They cover deaths in India, Ceylon, South Africa, Burma, Egypt and a dozen more deaths).
The index covers both soldiers, soldiers wives and children. The format is Surname, Christian name, Location of Registration of Death, Year of Death and Page of Entry.