On the 15th of December, 1778, about six months after the death of Voltaire, his private library at Ferney was bought by Catherine the Great of Russia for 30,000 rubles plus a certain number of valuable presents to Mme Denis, Voltaire's niece. This library consiste of about 7500 volumes comprising, because of the number of large sets, about 2500 to 3000 titles. Catherine received her purchase at St. Petersburg on July 30, 1779. Wagnière, the secretary of Voltaire, had been engaged to arrange the books in the same order as at Ferney and to prepare the manuscripts for binding. He arrived in St. Petersburg, as he tells us, “le 8 auguste 1779” and remained in Russia at the execution of the task set him by Catherine until probably January or February, 1780. The library was installed in the Hermitage and remained there until about 1862, when it was transferred to the Imperial Library of St. Petersburg, now the Public Library of Leningrad. There in the Fine Arts Division of the Philosophy Section these books are still to be found, carefully stored in their locked cases behind glass doors and supposed still to stand in the order in which they were arranged by Wagnifere after that used by Voltaire himself at Ferney. Most of his books are contained in two large double-faced cases, each case about twenty feet long and ten shelves high, giving a total book space of some eight hundred feet. The bottom shelves are reserved for folio volumes, the second shelves for quartos and the smaller volumes appear on the higher shelves. A somewhat smaller case in the gallery above contains the rest of Voltaire's books. Under the former government of Russia no one was allowed to consult more than five books of this collection a day. This limit is no longer imposed and during the summer of 1927 the authors of this article were permitted to have before them on their tables any number of volumes that they wished.