Over 18 days in June 1827 at least 100 members of the Pallittorre clan from the North nation were killed in reprisals for the killing of three stockmen and Ryan calculates that in the eight months from 1 December 1826 to 31 July 1827 more than 200 Aboriginal people were killed in the Settled Districts in reprisal for their killing of 15 colonists. An entire clan of 150 Oyster Bay people may have been killed in one pursuit through the Sorell Valley in November 1827, significantly reducing population numbers. In September Arthur appointed another 26 field police and deployed another 55 soldiers from the 40th Regiment and New South Wales Royal Veteran Company into the Settled Districts to deal with the rising conflict.