He returned with Gordon as second-in-command on his journey to Khartoum commencing with departure from Victoria station in February 1884. Wounded during the siege, Stewart led an attempt to break the blockade aboard the Steamer Abbas in September 1884, along with the British consul Frank Power (who was also the correspondent from The Times), the French consul Léon Herbin, and other residents of Khartoum.
After returning with Gordon as his second-in-command, Stewart embarked on a journey to Khartoum in February 1884, departing from Victoria station. During the siege, he was wounded and led an attempt to break the blockade aboard the Steamer Abbas in September 1884 alongside British consul Frank Power (who also worked for The Times), French consul Léon Herbin, and other residents of Khartoum.