In his publication Grete Herball, he considered tomatoes as poisonous due to their levels of what would later be called tomatine, plus high acid content.
在他的出版物《伟大的草药》（Grete Herball）中，他认为番茄是有毒的，因为它们有后来被称为番茄碱的含量，加上有高的酸含量。