that the British would sell firearms on conditions that Siam "were at peace with the friends and neighbours of the British nation", indirectly referring to Burma. Siamese court, whose main concern in dealings with Western powers was to purchase firearms to be used in Burmese Wars, were dissatisfied. The final straw came when Crawfurd delivered the personal letter of the Kedah sultan to King Rama II, complaining Nakhon Noi as the source of his discontents. The negotiations were effectively soured. Crawfurd eventually departed for Saigon later that year. Despite the events during his mission in 1822, Crawfurd remained in contact with the Siamese court as the Resident of Singapore. In the First Anglo-Burmese War in 1824, Crawfurd informed Siam that the British Empire was at war with Burma and requested Siamese aid. King Rama III then assigned Siamese troops led by the Mon commander Chaophraya Mahayotha to assist the British in Tenasserim Region. However, the 'Mergui Incident' in 1825, in which Siamese and British commanders argued over the deportation of people of Mergui, prompted King Rama III to withdraw all troops from Burma. Lord Amherst then sent Henry Burney to Bangkok in 1825. Henry Burney arrived at Ligor where he was escorted by Nakhon Noi to Bangkok in 1826. Agreements were reached and the Burney Treaty was signed in June 1826. Burney Treaty ended traditional Siamese royal court monopoly by allowing the British to trade freely and privately, in which the British accepted of Siamese domination over Kedah. The Burney Treaty also offered the British some disadvantages. The British in Siam, who were horrified by the Nakhonban methods of judiciary tortures, were still subjected to Siamese laws and court. The infamous Phasi Pak Reua or the measurement duties were still intact. After the First Opium War in 1842, the British came to dominate maritime trade in Asia and the British pushed for more free trades. Siamese court introduced the Chinese tax collector system, in which Chinese merchants would 'auction' for new commodity taxes and levy the taxes on behalf of government. This new taxation system effectively re-imposed trade barriers in the 1840s. James Brooke the governor of Labuan arrived in 1850 to amend agreements. However, his proposals were vehemently rejected by Siamese trade officials. Brooke even suggested gunboat diplomacy but eventually left empty-handed. It was not until the Bowring Treaty of 1855 that the British rhetorical demands were achieved. Post-Bowring: