1931–32: studies with Rudolf Koch in Offenbach, Germany as a punch cutter and type designer. 1935: studies illustration at the Colorado Springs Fine Art Center. Teaches at the Arts Student League. Chappell produced much work with the publisher Alfred A. Knopf and was also illustrator and typography consultant for the "Book of the Month Club".
* TYPOGRAPHY – An Encyclopedic Survey of Type Design and Techniques Throughout History by Friedrich Friedl, Nicolaus Ott (Editor), Bernard Stein, published by Könemann Verlagsgesellschaft mbH.