Seven points of departure

When someone had trouble saying goodbye and getting out the door, after he left my mother would say, "He obviously doesn't know the seven points of departure." I never knew where it came from until recently. My sister sent me a copy of a Reader's Digest article from 1933 (condensed from Atlantic Monthly same year) called, "The Seven Points of Departure." It is a humorous list of points starting with, "First stand up," and goes on until one is out the door. Anyone else heard this expression?