Ainsworth was the surgeon and geologist on the Euphrates expedition. This account of the geological work of the expedition is dedicated to the leader, Francis Chesney.

First edition. 8vo, 343, [16](ads dated September 1838)pp., lithograph frontispiece (foxed), title-page vignette, folding map, 3 large folding hand-coloured geological sections, 2 vignettes in text, foxing to title, coriginal blindstamped blue cloth gilt, small chip to head of spine, a very good copy.

Atabey 10.