Pre-publication offer now made of $28.50 a set to all who subscribe before October first. After that date the price will be advanced to $32.00 a set. The original price was $91.00 for the 13 volumes, almost prohibitive for private libraries, although as the standard reference work on modern history it should be in every well equipped library. Circulars available to send out in advance to possible purchasers, so that you may know in advance what your needs will be for the set at the $28.50 price. No payment need be made until after delivery, in October.