D O C . 4 2 3 L E T T E R S F R O M R U S S I A N P R I S O N S 6 4 1 Published in Berkman 1925, p. 7. Dated by the earliest of the prefatory letters. The publication date is inferred from the date of the latest of the prefatory letters, 29 July 1925 (see Berkman 1925, p. 10). See the preceding document for annotation.