I don't know them, though I have been in correspondence with him for many years till lately.

我不认识他们， 尽管我多年来一直与他通信直到最近。

He supposed she was in correspondence with Morris Townsend; but he held his peace about it, for he never saw the young man's letters, and Catherine's own missives were always given to the courier to post.

他猜想她在和莫里斯·汤森德通信。但他对此保持沉默，因为他从来没有看过年轻人的信件，而凯瑟琳自己的信件总是交给信使邮寄。