Conversation so far:
How was Georgette Heyer's marriage life?
Two months after her father's death, on 18 August, Heyer and Rougier married in a simple ceremony.
Did they have a happy marriage?
She insisted they return to England before starting a family.
What happened during their marriage?
In October 1925 Rougier was sent to work in the Caucasus Mountains, partly because he had learned Russian as a child.
Heyer remained at home.
What led to her wanting to return to England?
In 1928, Heyer followed her husband to Macedonia, where she almost died.

Question: What led to her almost dying?
Self-contained rewrite: What led to Georgette Heyer almost dying?