Dow served as the governor of Sindh from 1 April 1941 to 14 January 1946, succeeding Sir Lancelot Graham.[5] During his term as governor, Pir of Pagaro VI, a SufistPir (spiritual leader), led a group of fellow Hurs in an insurgency against British colonial rule. Pagaro's followers attacked police, military and civilian targets, killing dozens. In response, Dow called for the introduction of martial law to Sindh, which was passed through the Sindh Assembly via the 1942 Hur Suppression Act; martial law remained in effect in Sindh from June 1942 to May 1943.[6]British Indian Army, Indian Imperial Police and Royal Air Force elements were engaged in counterinsurgency operations against the Hurs, arresting several leaders including Pagaro himself.[7] Pagaro was tried in a military court on charges of "conspiring to war against the King-Emperor", found guilty and hung on 20 March 1943.[8]