ABSTRACT
The peninsula of Aden, on the south-west coast of Arabia, lies 100 miles east of the straits of Bab al-Mandab at the entrance to the Red Sea. It has an area of 21 square miles, the greater part of which is uninhabitable being covered by precipitous hills, the highest of which is Mount Shamsan, 1,775 feet. These hills slope towards the sea, forming many spurs and valleys.
