From a 1921 issue of the Journal of the American Medical Association:
DOCTORS, BEWARE!
We are undone — or possibly it would be more accurate to say that we are about to be undone. The medical profession is to meet its Napoleon. A few days ago those fortunate individuals whose names are on the mailing list of the Palmer School of Chiropractic, Davenport, Iowa, received a three-page letter from Napoleon Hill, the editor of Napoleon Hill’s Magazine, “A Magazine of Economic Philosophy” having offices in New York City. Napoleon has a secret for the chiropractors — such a vital secret that he can make public only a small part of it at this time. It is this: Napoleon, “in addition to carrying on a systematic propaganda … in behalf of Chiropractic” in his magazine, has “arranged with one of the best men in the moving picture business to write a psychological play that will be filmed and shown broadcast over America and in Canada.” But let Nap. tell it: