Having satisfied himself as to the character of the Saribas and Sekrang Dayaks, and how the chiefs governing them encouraged their depredations, and having received an appeal from the Rajah Muda Hasim[114] to relieve the cost of the perils it underwent, Captain Keppel resolved to attack the Saribas first, as being the most formidable of the two piratical hordes. Preparations for the expedition were soon commenced. It was to consist of a native force of 300 Malays, the _Dido's_ three large boats, and the _Jolly Bachelor_, manned by blue-jackets and marines, all under the command of Lieutenant Wilmot Horton. The datus were opposed to the Rajah going—they thought the risk too great, but on his expressing his determination to do so, and leaving it to them to accompany him or not, their simple reply was, "What is the use of our remaining? If you die, we die; and if you live, we live; we will go with you."[115] The Rajah and Captain Keppel accompanied the expedition in the _Dido's_ gig. Intelligence of the design was carried far and wide. The Saribas strengthened their defences, and several of the half-bred Arab sherips living nearer Sarawak sent in promises of good conduct. Tribes that had suffered from the depredations of the pirates offered to join in attacking them, and the force thus augmented by several hundreds of Dayaks started early in June. The first skirmish fell to the lot of Datu Patinggi Ali, who, having been sent on ahead, met a force of seven prahus at the mouth of the Saribas, which he attacked and drove back, after capturing one. Padi, a stockaded town some 60 miles up the Saribas river, and the furthest up of the piratical strongholds, reputed also to be the strongest and most important, was the first attacked, and though defended by two forts and two booms of forest trees stretched across the river, and being crowded with Malay and Dayak warriors, it was carried on the evening of June 11, and the place committed to the flames. The next day some 800 Balau Dayaks,[116] under Sherip Japar of Lingga, joined the force, keen to make reprisals for past injuries.