This section of the book is from the "Household Companion: The Home Book Of Etiquette" book.
Visits of friendship are governed by no set rules of etiquette, and need not be formal either as to length or manner. It is to be presumed that friends or relatives will conform to each other's tastes and habits, and conduct themselves in a manner that will be mutually agreeable. With intimate friends strict ceremony is uncalled for, yet there are certain liberties which you enjoy at home which are not proper to take in the house of a friend.
It is a sign of ill-breeding, in such a visit, to criticise the conduct of servants or children, or anything connected with the household or the members of the family. Remarks of any kind on the faults or foibles of persons belonging or closely related to the family are sadly misplaced; and such remarks made after taking leave show a lack of good feeling which is not redeemed by being unheard by those interested. In such cases one should strictly apply the golden rule of friendship, to do nothing by act, word, or deed that may cause a disagreeable feeling on the part of an entertainer or any member of his family.