The author is sorry that Ershov could not come to Boston; he is discussing the ways of inviting foreign scientists under the exchange conditions, and the conferences that Ershov might attend depending on the time of his visit; promises to help with the books for Ershov's son

on the advice by Prof. Ottinger the author sends his paper "Some Applications of Logical Syntax to Digital ComputerProgramming" to A.A. Liapunov and asks for the opinion. Apparently, since in a year the letter got to Ershov, Liapunov asked him to look at the paper.