 On 14 August 1960 she arrived at Ibadan where she paid visits to tropical forests and the Olokemeji Forest Reserve.Later that month she also travelled to Minna, Nigeria from Jebba railway station to see the savannah zone.Between 27 January and 5 February 1994, Gillham spent time travelling around Zimbabwe, as well as spending a full day in Botswana, joining a sail along the River Chobe boundary of Namibia and also participating in a walk across Victoria Falls bridge to Zambia.