In the hours following Gordon's death an estimated 10,000 civilians and members of the garrison were killed in Khartoum. The massacre was finally halted by orders of the Mahdi. Many of Gordon's papers were saved and collected by his two sisters, Helen Clark Gordon, who married Gordon's medical colleague in China, Dr. Moffit, and Mary Augusta and possibly his niece Augusta, who married Gerald Henry Blunt. Gordon's papers, as well as some of his grandfather's (Samuel Enderby III), were accepted by the British Library around 1937.