How to Write Letters (Formerly The Book of Letters)

"[...] Forms of salutation to be avoided are "Dear Miss," "Dear Friend," "Messrs." In memoranda between members of a company the salutations are commonly omitted—but these memoranda are not letters. They are messages of a "telegraphic" nature. Titles In the matter of titles it has been established by long custom that a title of some kind be used with the name of the[...]".