midday
`` Here , we can trust no one . '' Thereupon they commenced their singular and self-imposed task . In turn they went back to the hotel for breakfast , and watched fruitlessly throughout the morning . They lunched in the same way , and throughout the great midday heat sat hidden in the ruined building , mounting guard over that iron-studded door . It was a dreary and monotonous day , long to be remembered by both of them , and when the hour of sunset drew nigh , and their vigil remained unrewarded , they began to doubt the wisdom of their tactics . The street was but little frequented ; there was not the slightest chance of their presence being discovered . It was very quiet , too , so that no one could have approached unheard .