Sherwin Cody

In 1903 Cody produced a version of his course in pocket-sized book form as The Art of Writing and Speaking the English Language which he advertised in the business magazine The System and elsewhere.

"[7] Later Cody's account was managed by Sackheim protégé Victor Schwab, who treated it as an example of the scientific approach to advertising.

Cody and his wife Marian lived near Chicago until the 1920s when they moved to the community of Dobbs Ferry, New York at 23 Summit Terrace.

[citation needed] The Sherwin Cody 100% Self-correcting Course in English Language arrived in 25 weekly booklets, each divided into five sections.

Cody marketed his course on the English language from 1918 until his illness and death in the late 1950s, when it was sold to the US School of Music and later discontinued.

The course was revised in the 1930s with an increased emphasis on speaking (perhaps in reaction to Dale Carnegie’s How to Win Friends and Influence People).