Samuel Hopkins Adams reports that even as Hartman “virtuously disclaims” the product is not a cure-all, the company “grasps at a golden opportunity by advertising his nostrum as a preventative against yellow fever” (Adams 1907). Adams’s Great American Fraud separately documents Peruna’s “ghoulish exploitation, for profit, of the yellow-fever scourge in New Orleans,” aided by southern newspapers that ran a company-supplied “interview” with Hartman as news (Adams 1907). No source in this bundle documents any period medical authority endorsing Peruna, an alcohol-and-water tonic, as a preventive for yellow fever, or for any disease outside the “catarrh” framing on which the product’s whole marketing depended. The claim is logged as testimonial-grade and refuted on Adams’s own chemical finding that the product’s actual contents — grain alcohol, water, and a trace of “mild drugs” — could not plausibly cure or prevent any of the diseases advertised (Adams 1907).