Andrew Wyld and Evelyn Joll have suggested that this drawing, formerly attributed to David Roberts, may well be by the German-born watercolorist and engraver C. F. H. Werner. Werner spent much of his life in England, becoming a student at the Royal Academy in 1848 and participating in their exhibitions. In 1860 he went to Egypt, Palestine, and Syria; in 1873 he returned to Egypt.