Abbie H.D. Gardner (1860 - 1918)

Mrs. ABBIE H.D. GARDNER, a civilian. Abbie was born in 1860 and was 56 when she died on 21^st January 1918. She was buried in Cairo New British Protestant Cemetery - Grave Reference: Plot C Grave 28.   But what was Mrs Gardner doing in Egypt and how did she die?  I can’t find any further information about Abbie Gardner – can anyone help please?