Map showing transit routes through the Luangwa Valley used by early traders and settlers. New place names are shown in red andapproximate locations of protected areas in green (NLNP – North Luangwa National Park; SLNP – South Luangwa National Park; LNP – Luambe National Park). 1:Site of sleeping sickness commission at Nawalia. 2: Site of abandoned river crossing at Hargreaves (near Luembe).Adapted from Willett , original taken with some additions from page 198 of Vol. 2 of The Sleeping Sickness Bulletin (1910).