In 1997 and 2004, John Pullen and Trevor Hughes Parry published a set of manuscripts by and relating to Thomas Robert Malthus held at the Kanto Gakuen University in Japan. Their achievement is impressive. However, a few important elements relating to these manuscripts escaped their attention. These elements concern Malthus, but also his very good friend and theoretical opponent David Ricardo. The purpose of this article is to point out these elements inasmuch as they enable 1) the establishment of the correct dating and contextualization of some manuscripts, and 2) the attribution of the true authorship of some other material.