This record is especially interesting because it said there was a herd of about 110 sea lions in the vicinity of Hyeonseok-gumi (玄石龜尾 - Hyeonseok Cove) and Jusa-bong (朱砂峯), which were on the north shore of Ulleungdo. Some Korean historians claim that Koreans used to travel ninety-two kilometers beyond Ulleungdo to Liancourt Rocks (Dokdo) to hunt sea lions, but this record clearly shows that these Koreans hunted their sea lions on Ulleungdo, not Liancourt Rocks.
Gangwon Governor Yun Seong-tae (尹聲大) Reports to the King about Ulleungdo Inspection.
On April 8th, Samcheok Commander Lee Gyeong-jeong (李慶鼎) lead low-ranking officials (員役) to Ulleungdo's Hwangto-gumi (黄土龜尾 - "Golden Clay Cove"), where they anchored. Surveying the geography of the island, they saw Byeongpung Rock (屛風巖 - "Folding Screen Rock") on the right and Hwangto Cave (黄土窟 - "Golden Clay Cave") on the left. The juniper trees on the mountain peaks had not yet changed colors (非不交翠) and they were all short and small. They searched the whole day for juniper to present to the king, but barely harvested more than they started with. They then headed to Hyeonseok-gumi (玄石龜尾 - "Black Rock Cove"), where they saw a herd of about 110 sea lions mooing like cows. They got two of them with guns and clubs. They looked up and saw the highest peak, which they judged to be the so-called, Jusa-bong (朱砂峯 - "Cinnabar Peak"). Thus, they proceeded to inspect around the island without incident.
I am presenting a map of the island and 2 pieces of rosewood incense (紫檀香), which are sealed in this letter. As is the custom, the subjects of the king will send ten more pieces of rosewood incense (紫檀香) , three green bamboo, six seung (升) of red ocher (石間朱), and two sea lions (可支魚). After each is measured, they will be sent to the Bibyeonsa (備邊司).