The Agony Columnby Earl Derr BiggersCHAPTER ILondon that historic summer was almost unbearably hot. It seems, looking back, as though the big baking city in those days was meant to serve as an anteroom of torture - an inadequate bit of preparation for the hell that was soon to break in the guise of the Great War. About the soda-water bar in the drug store near the Hotel Cecil many American tourists found solace in the sirups and creams of home. Through the open windows of the Piccadilly tea shops you might catch glimpses of the English consuming quarts of hot tea in order to become cool. It is a paradox they swear b