From Khartoum, he proceeded up the White Nile to Gondokoro. During his time in Sudan, Gordon was much involved in attempting to suppress the slave trade while struggling against a corrupt and inefficient Egyptian bureaucracy that had no interest in suppressing the trade. Gordon soon learned that his superior, the Governor-General of the Sudan, Ismail Aiyub Pasha was deeply involved in the slave trade and doing everything within his power to sabotage Gordon's anti-slavery work by denying him supplies and leaking information to the slavers. Gordon also clashed with Chaillé-Long, whom he accused of working as an informant for Aiyub Pasha and called him to his face a "regular failure". Chaillé-Long in return painted a very unflattering picture of Gordon in his 1884 book "The Three Prophets", whom he portrayed as a bully, a raging alcoholic, an incompetent leader and a rank coward. Faught argued that since no one else who knew Gordon in Equatoria described him in these terms and given that Gordon's accusation that Chaillé-Long was a spy for Aiyub Pasha seems to be justified, that Chaillé-Long was engaging in character assassination as an act of revenge.