Livy wrote from Florence to her mother:

This evening Mr & Mrs Chamberlain were in for an hour  & we sat about a wood fire & chatted—then Mr Clemens read to us—then to  bed—where I am now—Florence is much more restful than Venice, because we have  no social demands—and one ought to know no one when they are visiting picture  galleries—The Chamberlains are a perfect delight, they never tax us in the  least they are helpful to us and are bright beyond expression [MTNJ 2:  226n19].

Mr. &  Mrs. Augustus P. Chamberlaine were friends of Ralph Waldo Emerson.  The Clemens met them in Venice [220n10]