At that point, he started doing some side work for Mrs. Cyrus McCormick.
As a composer he was also prolific with a catalogue of nearly 750 compositions in various forms: 31 piano sonatas, three piano concertos, three violin sonatas, a large 1937 work for orchestra (Variations, Disguises, and Fugue, on a Merry Theme of Cyrus McCormick), along with works for string quartet, oboe, and vocal ensembles.
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His second largest professional fee came from successful participation in the "Reaper Case", McCormick v. Manny.
He was the nephew of Cyrus McCormick, founder of the agricultural machinery company that became International Harvester.
In 1834, Andrew Jackson was President of the United States (all 24 of them), Cyrus McCormick received a patent for his mechanical reaper and Stedman Foundry and Machine Works was established in Rising Sun, Indiana, by Nathan R. Stedman.