Treaty of friendship and commerce between Great Britain and Siam (1856)
“ All British subjects coming to Siam shall receive from the Siamese Government full protection and assistance to enable them to reside in Siam in all security, and trade with every facility, free from oppression or injury on the part of the Siamese; and all Siamese subjects going to an English country shall receive from the British Government the same complete protection and assistance that shall be granted to British subjects by the Government of Siam. ”
