This article presents three hitherto unpublished letters by Frank Plumpton Ramsey on the foundations of mathematics with commentary. One of the letters was sent to Abraham Fraenkel and the other two letters to Heinrich Behmann. The transcription of the letters is preceded by an account that details the extent of Ramsey's known contacts with mathematical logicians on the Continent.

中文翻译：

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弗兰克·普朗普顿·拉姆齐 (Frank Plumpton Ramsey) 关于数学基础的三封信

本文介绍了弗兰克·普朗顿·拉姆齐 (Frank Plumpton Ramsey) 迄今为止未发表的三封关于数学基础的信件和评论。其中一封信寄给了亚伯拉罕·弗兰克尔，另外两封信寄给了海因里希·贝曼。这些信件的转录之前有一个描述，详细描述了拉姆齐与欧洲大陆数理逻辑学家的已知接触范围。