 She took a job as a secretary.In her spare time Sandes trained with the First Aid Nursing Yeomanry (FANY), founded in 1907, as an all-women mounted paramilitary organisation, learning first aid, horsemanship, signalling and drill.She left the FANY in 1910 joining another renegade FANY, Mabel St Clair Stobart, in the formation of the Women's Sick & Wounded Convoy.