Madi people sources of the river Nile". He also hoped to meet the East African expedition led by John Hanning Speke and James Augustus Grant, somewhere about the Victoria Lake. Baker spent a year on the Sudan-Abyssinian border, during which time he learned Arabic, explored the Atbara river and other Nile tributaries. In early 1862 he arrived at Khartoum, and in December the same year, he left the city to follow the course of the White Nile. Months later in arrived in Gondokoro. In 1862, Speke and Grants who Mr. Baker planned to meet Mr Baker in Gondokoro, arrived in the Madi
John Hanning Speke Grant reached Gondokoro in Southern Sudan, where he met Samuel Baker and his "wife". (Her name was Florence von Sass and she had been rescued by Baker from a slave market in Vidin during a hunting trip in Bulgaria.) Speke had expected to meet John Petherick and his wife Katherine at Gondokoro, as they had been sent by the RGS south along the Nile to meet Speke and Grant. However the Pethericks were not there but on a side expedition to trade ivory, as they had run out of funds for their expedition. This caused some hard feelings between Pethrick