The de VIsle Map. 207 



4. " Carte de la Siberie et des Pays voisins. Pour servir a 

 Histoire generale des Voyages par le S. Bellin, Ing. de la Marine," 

 two parts, undated, but to which E. Dufosse, of Paris, assigns the 

 date of 1749. The atlas for this work was originally published 

 by Abbe Prevost at Paris, 1747, et seq., the charts being engraved 

 by Bellin. 



This chart appears on casual inspection to be more accurate 

 than either that of d'Anville or of de I'lsle, or of the Russian 

 atlas. 



5. The very interesting and valuable map of J. N. de I'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 men- 

 tioned in his review as follows : 



" A chart which deserves notice, though ahxiost wholly fictitious, being 

 chiefly devoted to tlie spurious discoveries of tiie alleged Admiral de 

 Fonte, was issued by J. N. de I'Isle with the concurrence of M. P. Bauche 

 or at his suggestion. It appeared at Paris in 1752, and was copied for 

 Jefi'ery's second edition of voyages from Asia to America in 1764. I do 

 not Ivnow if this copy appeared in the first edition, but presume it did." 



As the original of de I'Isle's chart (1752) is here exhibited to- 

 night, it is evident that Jefifery 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 clown, as 

 the map of the Imperial Academy of Sciences, embodying the 

 geographical results of Bering's voyage to the coast of America, 

 Avas not engraved until a year later, while de I'Isle's of 1752 does 

 not contain them." You will see that this is an error, for the 

 " I (sle) cle Beering " is plainly inscribed on the map. (This map 

 has been reproduced by photolithography and forms the accom- 

 panying plate 21.) 



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 tlie Chukcliis east of the 

 strait witli tliat Avhich they knew to be visible in clear weather from Cape 

 Yakan, more or less confused accounts of wliich liad long been current 

 among persons interested in these regions." 



