The record is interesting because it talks about the inspection party going to "Sea Lion Cave," where they found seven or eight sea lions. I am not sure if they were talking about a particular cave, but there is a cave called "Sea Lion Cave" on the west coast of Ulleungdo. Korea claims that Ulleungdo inspectors used to travel to Liancourt Rocks (Dokdo) to hunt sea lions, but this record and others show that they hunted sea lions on Ulleungdo, not Liancourt Rocks.
Gangwon Governor Jeong Won-yeong Reports Inspection of Ulleungdo
In accordance with the standing order to conduct biennial inspections of Ulleungdo, Samcheok Commander Ha Si-myeong (河始明) reported that on April 16th, he led Japanese interpretor Choi Gap-mun (崔甲文) and eighty more people, including officials and sailors, boarded four ships, and reached Ulleungdo on April 23th. Surveying the geography of the island, they saw Hwangto Cave (黄土窟 - "Golden Clay Cave") on the left and and Byeongpung Rock (屛風巖 - "Folding Screen Rock") on the right.
At five ri from Hwangto-gumi (黄土龜尾 - "Golden Clay Cove") toward the central peak, there was an area where fields and paddies could be cultivated. There were also old foundations of dwellings. From there they advanced to the the cove entrance, where there was a cliff with juniper trees on top that could be sealed and presented to the king, so they harvested them. Afterwards, they went to Pyeongtak-gumi (萍卓邱尾 -"High Duckweed Cove"), where there was a grove of large bamboo. The bamboo had been thinned out, but they harvested the largest among them. Then they headed east to Jangsa-gumi (長沙邱尾), where they saw from a distance a bamboo grove on top of the cliff, but it was all small bamboo. They entered the island and thoroughly inspected its interior for three days.
The circumference of the island is about eighty or ninety ri, and it is all rock mountains. The trees on the island include mulberry, pinenut, paulownia, elm, juniper, and hazelnut. The birds on the island include crow, sparrow, sea gull, and quail. The creeping animals are cats and rats. The sea products include brown seaweed, abalone, and various fish.
They went to Sea Lion Cave (可支魚窟), where they surprised seven or eight sea lions. They shot and clubbed them and got two of them before they could jump into the sea. On April 27th, they came back and anchored at Gangneung (江陵).
I am presenting 2 pieces of rosewood incense (紫檀香), which are sealed in this letter. In addition, there are ten more pieces of rosewood incense (紫檀香) , three green bamboo, six seung (升) of red ocher (石間朱), and two skins of sea lions (可支魚). As is the custom, we will send a map of the island, two skins of sealions, three green bamboo, six seung (升) of red ocher (石間朱), and twelve pieces of rosewood incense (紫檀香) to the Bibyeonsa (備邊司) after they are inventoried.