when it was realised that major cummings was the whistle blower he suddenly became very unpopular with the rest of the regiment , but he wouldnt take the hint and resign , and colonel jameson just didnt have enough hard evidence to push him , so when the special exercise involving david was conceived he rang the colonel , confidentially of course , for some advice , and the advice that he got was send cummings although the colonel failed to mention the equipment that he knew to be at el campo .