 This frightened the Brooke government following the rebellion by the Bau Chinese in 1857, and the massacre of Europeans in SE Borneo in May of 1859, at the start of the Banjarmasin War.In early 1860, Masahor ordered Temenggung Hayim Jalil from Brunei to go to Pontianak for a meeting with Abdul Gapur.In early February 1860 they mounted an assault on Kuching (at that time, Sarawak), according to Masahor's plan.