Note 89 — LETTER XXIV.

From the pods and their contents Dr. Klotzsch recognised the Moringa arabica Persoon (Hyperanthera peregrina Forskăl). It seems that this tree was only previously known from Arabia, and is natural there. The single trees near Barkal, which are not mentioned by former travellers, might have been first introduced from Arabia. This is the more probable as the immigration of those tribes of the Shaiqîeh Arabs from the Hegâz is now testified by manuscript authorities. [This tree must therefore be added to the botanical list of Pickering, who, in his Races of Man, has collected all the introduced animals and plants of Egypt, India, America, Polynesia, Southern Arabia, &c., and though the lists want classification, they are well worthy of attention.—K. R. H. M.]