The reason I am posting the map is that it was 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 used 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, which was entitled "Concerning Matsushima 2," Mr. Watanabe referred to the map in the following way:
英ノロヤールアトラスMr. Watanabe wanted to confirm the location of Dagelet Island because he suspected the Japanese name "Matsushima" (松島) was being used together with "Dagelet" to refer to Korea's Ulleungdo Island. Traditionally, the name "Matsushima," or "Oki's Matsushima," was used to refer to Liancourt Rocks, which Mr. Watanabe believed to be Japanese territory.
Britain's "Royal Atlas"