Use every effort to soothe and tranquilize your principal; do not see things in the same aggravated light in which he views them; extenuate the conduct of his adversary whenever you see clearly an opportunity to do so, without doing violence to your friend's irritated mind.

Endeavor to persuade him that there must have been some misunderstanding in the matter.

Check him if he uses opprobrious epithet towards his adversary, and never permit improper or insulting words in the note you carry.
3.

To the note you carry in writing to the party complained of, you are entitled to a written answer, which will be directed to your principal and will be delivered to you by his adversary's friend.

If this be not written in the style of a gentleman, refuse to receive it, and assign your reason for such refusal.