He afterwards did conjecture (but it was mere conjecture) that some injury which her haughty spirit had received in her cause of quarrel with her sister had wounded her beyond all reason, but she wrote him that from the date of that letter she died to him--as in literal truth she did--and that the resolution was exacted from her by her knowledge of his proud temper and his strained sense of honour, which were both her nature too. 
He afterwards did wonder if some quarrel with her sister had wounded her haughty spirit beyond all reason, but she wrote to tell him that from that date she died to him, and that she resolved on this through her knowledge of his proud temper and his sense of honour. 