 On 16 October, a group of 170 Naval Fusiliers landed on Ganghwa island, seized the fortress which controlled the Han river, and occupied the fortified city of Ganghwa itself.On Ganghwa Island, the Naval Fusiliers managed to seize several fortified positions, as well as booty such as flags, cannons, 8,000 muskets, 23 boxes of silver ingots, a few boxes of gold, and various lacquer works, jades, and manuscripts and paintings that comprised the royal library (Oikyujanggak) on the island.From his earlier exploratory expedition, Roze knew it was impossible for him to lead a fleet of limited force up the treacherous and shallow Han River to the Korean capital and satisfied himself instead with a "coup de main" on the coast.