Nothing is quite so essential to giving a man that well-turned-out appearance as a crisply four-folded white handkerchief tucked into his breast pocket.The same fancy fold comes in handy many times in women’s dress as well, to add a touch of white or other color.
Here’s how it’s done:
Fold handkerchief diagonally forming a triangle with the base toward you. First corner is at left, as shown.
Bring top part of corner No. 2 down and lay it beside No. 1.
Bring corner No. 3 over and lay it beside No. 2.
Bring corner No. 2a (the one remaining) down and lay it beside No. 3.
Fold the extra part left after the last fold to the underneath. It may be necessary to fold twice to conceal it behind the part that shows. Then fold the extra length under. Again it may be necessary to fold twice.
Tuck the handkerchief with points up neatly into pocket.
Source: The WorkBasket, 1955