Passage: The German high command expected Montgomery (one of the best-known Allied commanders) to play a key role in any cross-channel bridgehead. Clarke and the other deception planners reasoned that a high-profile appearance outside the United Kingdom would suggest that an Allied invasion was not imminent. An appropriate look-alike was found, M. E. Clifton James, who spent a short time with Montgomery to familiarise himself with the general's mannerisms. On 26 May 1944, James flew first to Gibraltar and then to Algiers, making appearances where the Allies knew German intelligence agents would spot him. He then flew secretly to Cairo and remained in hiding until Montgomery's public appearance in Normandy following the invasion.

Question: Who did they find a look-alike of?
Montgomery