About 11 km south of Green's Baobab is the turn-off to Chapman's Baobab, also known as Seven Sisters or Xaugam, i.e. "lion's tail" in Tsoa. It was once an enormous multi-stemmed tree, used by passing explorers, traders and travellers as a navigation beacon. It guided them as they navigated the extensive salt pan northwards, while a hollow in the trunk served as a letterbox. The explorer and hunter James Chapman left an engraving on a large root when he passed the tree with artist Thomas Baines in 1861, but Livingstone, Oswell, Moffat and Selous also camped here. Livingstone supposedly carved a cross and his initials, and conveyed his 1853 sojourn in "Missionary Travels", noting: "about two miles beyond immense saltpan Ntwetwe we unyoked under a fine specimen of baobab, ... It consisted of 6 branches united into one trunk." It had a circumference of 25 m before its constituent trunks collapsed outward on 7 January 2016. Not all its trunks are confirmed dead however, one showing signs of life in 2019.