Task: Question Answering
Input (English): Passage: Mountbatten believed that securing the states' accession to India was crucial to reaching a negotiated settlement with the Congress for the transfer of power. As a relative of the British King, he was trusted by most of the princes and was a personal friend of many, especially the Nawab of Bhopal, Hamidullah Khan. The princes also believed that he would be in a position to ensure that independent India adhered to any terms that might be agreed upon, because Prime Minister Jawaharlal Nehru and Patel had asked him to become the first Governor General of the Dominion of India.Mountbatten used his influence with the princes to push them towards accession. He declared that the British Government would not grant dominion status to any of the princely states, nor would it accept them into the British Commonwealth, which meant that the states would sever all connections with the British crown unless they joined either India or Pakistan. He pointed out that the Indian subcontinent was one economic entity, and that the states would suffer most if the link were broken. He also pointed to the difficulties that princes would face maintaining order in the face of threats such as the rise of communal violence and communist movements.Mountbatten stressed that he would act as the trustee of the princes' commitment, as he would be serving as India's head of state well into 1948. He engaged in a personal dialogue with reluctant princes, such as the Nawab of Bhopal, who he asked through a confidential letter to sign the Instrument of Accession making Bhopal part of India, which Mountbatten would keep locked up in his safe. It would be handed to the States Department on 15 August only if the Nawab did not change his mind before then, which he was free to do. The Nawab agreed, and did not renege over the deal.At the time, several princes complained that they were being betrayed by Britain, who they regarded as an ally, and Sir Conrad Corfield resigned his position as head of the Political Department in protest at Mountbatten's policies. Mountbatten's policies were also criticised by the opposition Conservative Party. Winston Churchill compared the language used by the Indian government with that used by Adolf Hitler before the invasion of Austria. Modern historians such as Lumby and Moore, however, take the view that Mountbatten played a crucial role in ensuring that the princely states agreed to accede to India. 
Question: What is the last name of the person who resigned based on policies by the man who believed that securing the states' accession to India was crucial?
Output (English): Corfield.