1875 Brue "Atlas Universel," China, Korea, & Japan

The following map, entitled "Carte Générale de L'Empire Chnois et du Japon," is from the 1875 edition of the "Atlas Universel De Geographie Physique," a French atlas with its authors listed as A. H. Brue and E. Levasseur. The map is entitled "Carte Generale de l'Empire Chinois et du Japon" and shows the counties of China, Korea, and Japan. You can read more about the map HERE.

The reason I am posting the map is that it was likely mentioned in an 1876 letter written by Watanabe Kouki (渡辺洪基), who was Director of the Bureau of Documents in Japan's Ministry of Foreign Affairs at the time. Mr. Watanabe was researching the location of Dagelet Island, which was the Western name for Korea's Ulleungdo Island, and he most likely referred to this map as an example of Western maps that showed Dagelet Island at the coordinates 37 degrees 25 minutes N. latitude and 130 degrees 56 minutes E. longitude.
In his letter entitled "Concerning Matsushima 2," Mr. Watanabe Mr. Watanabe referred to the map in the following way::

佛ブルーエノ大圖)
"Atlas Universel," by Brue of France

The map below shows an island labeled as "I. Dagelet," and an island labeled "I. Argonaut." Dagelet was referring to Korea's Ulleungdo, and the island labeled "Argonaut" did not exist because it was just a mismapping of Ulleungdo by the British Navy in 1789.

Traditionally, the name "Matsushima," or "Oki's Matsushima," was used to refer to Liancourt Rocks, which Mr. Watanabe believed to be Japanese territory, but he suspected that the name "Matsushima" was also being used to refer to Ulleungdo.