Dear Karpinsky! I am taking advantage of this opportunity to speak frankly with you.

There are every reason to expect that the Swiss police and military authorities (at the first gesture from the Russian or French ambassadors, etc.) will institute a court-martial or expulsion for violation of neutrality, etc. Therefore do not write anything directly in letters. If it is necessary to communicate something, write in chemistry. (The sign of chemistry — an underlined date in the letter.)

We have decided to publish the enclosed manifesto instead of theses that are not very readable.¹¹

Inform us of receipt, calling the manifesto "The Development of Capitalism."

It ought to be published. But we advise you to do this only on the condition of applying (and the possibility of applying) maximum precautions!!