 In it, he states that, from Ulleung-do, "to the west can be seen the rugged mountains of Daegwallyeong; beholding the sea to the east, I noticed a faint island in the "jin" (辰) direction (east-south-east), not more than one-third of the size of Ulleung, and not possibly more than 300 li (approximately 100km) away.