CHAPTER 12A CHAPTER OF ADVENTURES Worrals had never before flown over this part of the country, but she had travelled through it by road, and this supported her geographical knowledge, which was good. There was no lack of conspicuous landmarks. Far away to the east she could see the broad sweep of the great River Rhone, with the ancient walled city of Avignon clinging to it like a solitaire pearl. To the extreme south, about forty miles distant, was a turquoise iridescent shimmer that she knew must be the Mediterranean. Between her and the sea, beyond the foothills of the Cévennes, lay that curious tract of country known as the Plaine de la Crau, thousands of acres of yellow stony gravel, as flat as a table top, bisected by a line as straight as a ruler—the railway to Marseilles. The sig

