S. Annie Frost, Frost's Laws and By-Laws of American Society
“ A gentleman may always bow to a lady he may meet on a airway, even if not acquainted. If at the foot of the stairs, he must bow, pass her and ascend before her. If at the head of the stairs, he must bow, and wait for her to precede him in the descent.If two friends are walking together and meet a friend of one, a bow is all the salutation etiquette demands ”
