About midnight
Three times during the day he opened his eyes and looked about -- wonderingly at first -- then as though he understood . As one contented and at peace , he smiled and drifted again into the shadows . But now at times his hand went out toward her with a little movement , as though he were feeling for her in the dark . About midnight he seemed to be sleeping so naturally that they persuaded Helen to rest . At daybreak she was again at her post . Mrs. Ward and Mary had gone , in their turn , for an hour or two of sorely needed rest . Peter Martin was within call downstairs .