The second oldest book dedicated to Tonga was by William Mariner, adopted son of Fīnau ʻUlukālala, which was published in 1817. Mariner described his experiences during the years he was the adopted son of ʻUlukālala (1806–1810). He described the civil war and the siege of the Fort of Nukuʻalofa, which fell to ʻUlukālala and his warriors.