the headhunting practice. There used to be a tradition of retaliation for old headhunts, which kept the practice alive. External interference by the reign of the Brooke Rajahs in Sarawak via "bebanchak babi" (peacemaking) in Kapit and the Dutch in Kalimantan Borneo via peacemaking at Tumbang Anoi curtailed and limited this tradition. Apart from mass raids, the practice of headhunting was then limited to individual retaliation attacks or the result of chance encounters. Early Brooke Government reports describing Dayak Iban and Kenyah War parties with captured enemy heads. At various times, there have been massive coordinated raids in the interior and throughout coastal Borneo before and after the arrival of the Raj during Brooke's reign in Sarawak. The Ibans' journey along the coastal regions using a large boat called "bandong" with sails made of leaves or cloths may have given rise to the term, Sea Dayak, although, throughout the 19th Century, Sarawak Government raids and independent expeditions appeared to have been carried out as far as Brunei, Mindanao, East coast Malaya, Jawa and Celebes. Tandem diplomatic relations between the Sarawak Government (Brooke Rajah) and Britain (East India Company and the Royal Navy) acted as a pivot and a deterrence to the former's territorial ambitions, against the Dutch administration in the Kalimantan regions and client sultanates. Religion and belief For hundreds of years, the Iban's ancestors practiced their own traditional custom and pagan religious system. European Christian colonial invaders, after the arrival of James Brooke, led to the influence of European missionaries and conversions to Christianity. Although the majority are now Christian; many continue to observe both Christian and traditional pagan ceremonies, particularly during marriages or festivals, although some ancestral practices such as 'Miring' are still prohibited by certain churches. After being Christianized, the majority of Iban people have changed their traditional name to a Hebrew-based "Christian name" followed by the Ibanese name such as David Dunggau, Joseph Jelenggai, Mary Mayang, etc. For the majority of Ibans who are Christians, some Christian festivals such as Christmas, Good Friday, Easter are also celebrated. Some Ibans are devout Christians and follow the Christian faith strictly. Since conversion to Christianity, some Iban people celebrate their ancestors' pagan festivals using Christian ways and the majority still observe Gawai Dayak (the Dayak Festival), which is a generic celebration in nature unless a proper is held and thereby preserves their ancestors' culture and tradition. In Brunei, 1,503