From the big encyclopædia in the sky:
Dame Freya Madeline Stark. DBE.
In 1934, Stark sailed down the Red Sea to Aden and began a new adventure. She hoped to trace the frankincense route of the Hadhramaut, the hinterland of southern Arabia. Only a handful of Western explorers had ventured into the region but never as far or as widely as she. Her goal was to reach the ancient city of Shabwa, which was rumoured to have been the capital of the Queen of Sheba.
Click cover for Amazon link and note how rare and expensive most of her hardback books have become. Ex-library or well used books can be got at reasonable cost: many of her First addition, Mint & Fine used copies are not easily found.