In France, his work inspired many French printers and punchcutters such as Robert Estienne and Claude Garamond from 1530 onwards, even though the typeface of "De Aetna" with its original capitals was apparently used in only about twelve books between 1496 and 1499. Historian Beatrice Warde suggested in the 1920s that its influence may have been due to the high quality of printing shown in the original "De Aetna" volume, perhaps created as a small pilot project. "De Aetna" was printed using a mixture of alternate characters, perhaps as an experiment, which included a lower-case "p" in the same style as the capital letter with a flat top. In 1499, Griffo recut the capitals, changing the appearance of the typeface slightly. This version was used to print Manutius' famous illustrated volume "Hypnerotomachia Poliphili".