Milton Bunker's work analyzing personality from handwriting dates back to 1910, but my copy of his $1.00 book is from 1950. Grapho-analysis (in his hyphenated spelling) was his invention, combining the related field of graphology with his revelation that "it was the stroke that had value" (underline his), and that "grapho-analysis ... gave me a key, not only to myself but to strangers I met."
Bunker printed his Emotional Expression Chart (see below) on a clear plastic sheet that a trained professional was to place over a sample's upstrokes ("DO NOT JUDGE EMOTIONAL REACTIONS BY DOWN STROKES") (caps his) in order to determine your proclivities, such as talent and vocations, credit risk, and other traits you might never know you have by just living your handwriting-unexamined life.
One chapter is devoted to Franklin D. Roosevelt, who "had the ability to attract both hate and hero worship." FDR had apparently sent Bunker his handwriting when a mere New York governor, and he was rewarded with this sort of analysis: "When a writer makes blunt down strokes like the "t", he is positive, but when he braces a letter, such as a mountain burro braces his legs, he is stubborn."
Graphoanalysis is still practiced today by Bunker's IGAS and others, but the skeptics of the world show that it's pretty much hogwash and doesn't stand up to scrutiny: Unfortunately for the graphologists, scientific research has found no clear correlation between handwriting behavior and basic personality patterns. Although some psychologists believe that the subject is worth further study, the existing research is almost uniformly inconclusive or negative.
My favorite section is in the last few pages, in the book's equivalent of FAQ. Bunker reveals a personality trait common at the time (all spelling and punctuation [sic]):
Q. What books are available to the student who wishes to read about grapho analysis?
A. There is no current book. The International Grapho Analysis Society publishes a Grapho Analysis Dictionary which is available to the general public.... [other resources omitted]
Q. Does the use of the word, International, indicate that you have any communistic leanings?
A. This question is asked repeatedly although why it is, has never been plain. International means exactly what it says. There are trained and practicing grapho analysts in South America, Australia, India.... [other evidence of worldwide dominance omitted]
Q. What are your religious restrictions?
A. Catholics, Moslems, Buddhists, have all studied grapho analysis. Protestant teachers and members of probably all protestant denominations have studied and used grapho analysis. There is no political, racial, or religious discrimination. The Society does not accept Communist memberships.
I love that last line coming directly after "no political... discrimination." Also, I note that Jews are not listed among the religious organizations -- this probably reflects their perceived association with Communism at the time. I mean, if the word international is enough to alarm, I can't imagine how admitting to teaching members of the International Jewish Grapho Analysis Conspiracy would have gone over.
Some sample pages below: