midnight
said the sculptor , aghast at the passionate horror which was betrayed in the Count 's words , and still more in his wild gestures and ghastly look . `` Nay , if the height of your tower affects your imagination thus , you do wrong to trust yourself here in solitude , and in the night-time , and at all unguarded hours . You are not safe in your chamber . It is but a step or two ; and what if a vivid dream should lead you up hither at midnight , and act itself out as a reality ! '' Donatello had hidden his face in his hands , and was leaning against the parapet . `` No fear of that ! '' said he .