Lantern Slide - Khama; Life & Work of Dr David Livingstone; circa 1900; Lantern Slide depicting a head and shoulders portrait of Khama. It is part of an incomplete set of 40 slides; two are missing; illustrating highlights from Livingstone's life and travels. These slides were manufactured by the London Stereoscopic & Photographic Company for The London Missionary Society; circa 1900. Dr. David Livingstone (1813-1873) spent thirty years in Africa as a missionary