"General Map of the Chinese Empire and Japan": A map of the Qing Empire and Japan published by J. Andriveau-Goujon at Paris.<br><br> Note the lower course of the Yellow River prior to the 1850s floods.<br><br>This map or a somewhat later edition was taken by <a href="https://en.wikipedia.org/wiki/Evariste_Regis_Huc" class="extiw" title="w:Evariste Regis Huc">Huc</a> and <a href="https://en.wikipedia.org/wiki/Joseph_Gabet" class="extiw" title="w:Joseph Gabet">Gabet</a> during their historic journey across northern China to Lhasa and back in the early 1840s.<br><br>Longitude computed relative to Paris.
Adrien-Hubert Brué
<a rel="nofollow" class="external text" href="https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~279638~90052846:Carte-generale-de-l-Empire-Chinois-?qvq=q:%3D%22J.%20Andriveau-Goujon%22;lc:RUMSEY~8~1&amp;mi=68&amp;trs=196">"Carte Generale de l'Empire Chinois et du Japon"</a>, p. 32 of <i>Atlas de Choix ou Recueil de Cartes de Geographie Ancienne et Moderne</i>. Hosted at David Rumsey Map Collection.