 He became friendly with Khama, one of the sons of Sekgoma, the Bamangwato chief, enlisting his aid in reaching the Chobe River.Early the following year found him on the Zambesi River which he explored to within of the Victoria Falls, almost beating David Livingstone to their discovery.By 1854 he had teamed up with Samuel H. Edwards, another explorer, and launched an expedition to Lake Ngami after which he trekked through the territory between Northern Bechuanaland and the Zambesi.