5. The very interesting and valuable map of J. N. de l'Isle, Paris, 1752 (without, however, the accompanying memoir). I do not think the original map has ever fallen under the notice of Professor Dall, although a garbled reproduction of it is mentioned in his review as follows: "A chart which deserves notice, though almost wholly fictitious, being chiefly devoted to the spurious discoveries of the alleged Admiral de Fonte, was issued by J. N. de l'Isle with the concurrence of M. P. Bauche or at his suggestion. It appeared at Paris in 1752, and was copied for Jeffery's second edition of voyages from Asia to America in 1764. I do not know if this copy appeared in the first edition, but presume it did." As the original of de l'Isle's chart (1752) is here exhibited to-night, it is evident that Jeffery was careless, and that the map, which I infer Dall has never seen, is really more valuable than is set forth in his address; otherwise so critical an observer as Dall would not have said: "I suspect this (referring to d'Anville's map of 1753, with Bering island thereon) is the first publication of a cartographic kind on which Bering island is laid down, as the map of the Imperial Academy of Sciences, embodying the geographical results of Bering's voyage to the coast of America, was not engraved until a year later, while de l'Isle's of 1752 does not contain them." You will see that this is an error, for the "I(sle) de Beering" is plainly inscribed on the map. (This map has been reproduced by photolithography and forms the accompanying plate 21.) [Illustration: PLATE 21. CARTE GÉNÉRALE DES DÉCOUVERTES de l'Amiral de Fonte.] Dall further describes the copy of this map in the following terms: "Connected with America and north of the Chukchi peninsula is land with an island off it corresponding not badly to Wrangell and Herald islands and marked 'Discovered in 1722.' It is possible that this land is a hypothetical compound of the land reported by the Chukchis east of the strait with that which they knew to be visible in clear weather from Cape Yakan, more or less confused accounts of which had long been current among persons interested in these regions." {208} The legend on the original chart indicates that Dall's surmise is correct, for the copy is not only abbreviated, but is in error as to date. On the original it runs: "Grande Terre découverte en 1723 au s'enfeuit les Tzutzy l'orsqu'ils sont poursuivis par les Russes que ne les ont pas encore soumis."