Mary, while every external means of investigation was working at its highest pressure, had ransacked her husband's papers for any trace of antecedent complications, of entanglements or obligations unknown to her, that might throw a faint ray into the darkness.

玛丽，当每一种外部调查手段都在最大压力下工作时，她搜查了她丈夫的文件，寻找任何她不知道的先前复杂情况、纠缠或义务的痕迹，这些可能会在黑暗中投射出微弱的光芒。