Conversation so far:
Where was Georgette Heyer born?
Georgette Heyer was born in Wimbledon, London.
Did Georgette Heyer show interest in writing at an early age?
When she was 17, Georgette Heyer began a serial story to amuse her brother Boris.

Question: what was the story about?
Self-contained rewrite: What was Georgette Heyer's story about that she wrote when she was 17?