Arthur Donaldson Smith was an American explorer of East Africa. In 1894 and 1895, he led an expedition to Lake Rudolf and collected botanical, geological and zoological samples for scientific study. The expedition traversed 4,000 miles through British Somaliland, southern Ethiopia and Kenya. In 1897 he published a book about his travels, Through Unknown African Countries: the First Expedition from Somaliland to Lake Rudolf. He was a member of the American Philosophical Society and a Fellow of the Royal Geographic Society. Three species of reptiles, three birds and a desert musk shrew were named in his honor.