He published a treatise that he had written earlier on grammar, inventing his own system for the understanding and the learning of the Latin language.

发表了一篇他之前写的关于语法的论文，在这篇论文中他创建了自己的一套理解和学习,拉丁文的体系。

耶鲁公开课 - 弥尔顿课程节选