[6 In the Campbell map these are taken as east from London with an allowance of 67° between London and Tobolsk.]
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. Buache, or at his suggestion. It appeared at Paris, in 1752, and was copied for Jefferys' (2d) 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.
For present purposes the interesting features of this map are as follows:
Opposite the eastern extreme of the Chukchi peninsula there is represented part of America with the legend, "Terres vues par Mr. Spanberg in 1728, frequentées à présent par les Russes, qui en apportent de très belles fourrures." In the English edition the legend is "Seen by Spanberg 1728." Four islands are represented in the strait between Asia and America, corresponding in a general way to the four now known to exist there. 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.
The next chart of note in this connection was published by D'Anville, the royal geographer of France, who had previously prepared the original map of Bering for publication. He issued a general map of Asia, in three parts, each of two leaves which could be joined together, of which the first part appeared in 1751 and the third part in 1753, entitled:
Troisième Partie de la Carte/d'Asie,/contenant/La Sibérie/et quelques autres parties/de la Tartarie,/Publiée sous les Auspices de Monseigneur/Louis-Philippe d'Orléans/Duc d'Orléans/Prémier Prince du Sang./Par le Sr. d'Anville,/Sécrétaire de Son Alts. Serenisss./MDCCLIII./Avec Privilége./
This map is in two sheets (each 20 x 21 inches), the engraving of the geographical part by Guill. de la Haye and of the ornamental title by De Lafosse. The longitude is reckoned from Ferro, and the map is constructed on a scale of 23 French leagues to 60 geographical miles. The boundaries are colored and the sea shore shaded with short horizontal lines. It is on the polyconic projection.
This map includes many of the additions to geography in eastern Siberia which were due to the members of the great Siberian expedition. The courses and branches of the rivers especially were augmented and corrected as well as named. The branches of the Anadyr River were represented and named, but as no new information in regard to the coast had been received at that date, this river was still mapped as entering the sea to the south and west of Cape Thaddeus, as erroneously laid down by Bering, who confounded with the Anadyr a small river which does come in here, and passed the estuary of the true Anadyr without seeing it. The coast lines are essentially those of Bering. Beyond the basins of the Kolyma and Anadyr is marked "Terre inconnue"; a small supplement in the north-east corner of the map, on half the scale of the map, represents the north-east extreme of Asia as delineated by Bering. This little supplement is of considerable interest as it gives fuller information than that which appears on the original publication of Du Halde, perhaps from a more modern version of Bering's chart, as previously suggested.
Several names appear for the first time in cartographic history, upon this map. Preobrazhenia Bay; Bolshoia River falling into Holy Cross Bay, and the "Isle de St. Diomide" are among these. The Island of St. Demetrius is omitted, as well as its name. The Island of St. Diomide is placed about on a line between East Cape and Cape Chukotski, to the westward of the meridian of East Cape. There is a discrepancy averaging about five minutes in latitude and longitude between the positions on this map and those on the second version of the Bering manuscript charts. But in the main these differences are, I suspect, merely due to carelessness in copying, and the general harmony between the two leads to the belief that the D'Anville outline for this region was based on the second version of the manuscript.
The differences of position for points on this part of the coast are numerous. I have noted them in the comparative table of positions herewith. They may be chiefly owing to slips in transferring from the Mercator to the Polyconic projection; but some of them are due to new information, probably derived from the surveyors of the second expedition. Bering island appears on the map, in about its proper place, though Copper island is not indicated, nor are any of the Aleutians shown. I suspect this 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.