[Letter No. 117 and Krupskaya’s Letter No. 54.—Ed.] Since our legal letters were never exceptionally long and during the imperialist war, when this letter was written, we corresponded mainly by postcard, even registered postcards, and since many letters were lost in transit, the words quoted apparently refer to an illegal letter concealed in a book.
Como nuestras cartas legales nunca eran demasiado largas, y como durante la guerra imperialista, época en que fue escrita dicha carta, nos escribíamos principalmente tarjetas postales y además certificadas, y como muchas cartas se perdían, las palabras citadas al parecer se refieren a una carta ilegal oculta en un libro.