This section is from the book "Hill's Manual Of Social And Business Forms: A Guide To Correct Writing", by Thos. E. Hill. Also available from Amazon: Hill's Manual Of Social And Business Forms: The How-To-Do-Everything Book Of Victorian America.
ENVELOPES that are perfectly plain, for ordinary letter writing, are regarded as in much the best taste. Ladies do well to use white. Buff, light straw color, or manila answer for business purposes, though it is always in good taste to use white. The upper side of the envelope is that containing the flap. Care should be observed, in writing the superscription on the letter, to have the same right side up.
Extensive practice enables business men to write comparatively straight upon the envelope, without the aid of a line. The inexperienced penman may be aided in writing on the buff colored envelope by lead pencil lines, which should never be used, however, unless completely erased by rubber after the ink is dry.
Care should be taken to write upon the envelope very plainly, giving the full name and title of the person addressed, with place of residence written out fully, including town, county, State, and country if it goes abroad. The designation of the street, number, drawer, etc., when written upon the letter, is explained elsewhere.
A scrap of paper, ruled like this, when placed
inside a light - colored envelope, will enable the
person writing on the same to trace distinctly
these lines, and thus write the superscription