Samuel Marinus Zwemer,
Arabia: The Cradle of Islam
“ We must take at least a glimpse of the almost unknown region called Hadramaut. [26] This is a strip of territory stretching between the great desert and the sea from Aden eastward to Oman. Our knowledge of the interior of this region was almost a perfect blank until some light was thrown on it by the enterprising traveller A. Von Wrede in 1843. The coast is comparatively well known, at least as far as Makalla and Shehr. The land rises from the coast in a series of terraces to Jebel Hamra (5,284 feet) , which is connected on the northeast with Jebel Dahura, over 8,000 feet high. ”
