The decrease of the population during this period must have been very rapid. Vancouver in 1792, Broughton in 1796, and Trumbull in 1801, were strongly impressed with the misery of the common people and their rapid decrease in numbers. This was partly the result of wars, but was still more due to the diseases and vices introduced by foreigners. In the summer of 1804 a pestilence, supposed to have been the cholera, carried off half of the population of Oahu. Botany Bay convicts had introduced the art of distilling liquor before the year 1800, and drunkenness had become very prevalent. THE SANDAL-WOOD TRADE. During the first quarter of the present century the sandal-wood trade was at its height. This wood was in great request at Canton, where it was sold for incense and the manufacture of fancy articles. It was purchased by the picul of 133-1/2 pounds, the price varying from eight to ten dollars for the picul. This wood, while it lasted, was a mine of wealth for the chiefs, by means of which they were enabled to buy fire arms, liquor, boats and schooners, as well as silks and other Chinese goods, for which they paid exorbitant prices. THE CESSION OF KAUAI. In March, 1810, Kaumualii, the last King of Kauai, visited Honolulu in the ship Albatross, Capt. Nathan Winship, in order to have an interview with Kamehameha. It was then arranged between the two chiefs that Kaumualii should continue to hold his Island in fief of Kamehameha during his life-time, on condition of paying tribute. RUSSIAN AGGRESSIONS. During the year 1815 a Dr. Scheffer was sent to the Islands by Baranoff, the Russian Governor of Alaska. He built a fort at Waimea, for Kaumualii, on which the Russian colors were displayed, and urged him to place himself under the protection of Russia. On hearing of this, Kamehameha sent a large force to Honolulu, where a substantial fort was built during the year 1816. He also sent orders to Kaumualii to expel Dr. Scheffer, which was done. DEATH OF KAMEHAMEHA. Kamehameha I. died on May 8th, 1819, at Kailua, Hawaii. His work was done. He had consolidated the group under a strong government, put an end to feudal anarchy and petty wars, and thus prepared the way for civilization and Christianity. ABOLITION OF IDOLATRY. In accordance with his will, his eldest son, Liholiho, was installed as king, with the title of Kamehameha II., and Kaahumanu, his favorite queen, as premier, to exercise equal powers with the young prince, whose dissolute and reckless character is well known. Their first important act was the abolition of the tabu system, which took place at a great feast held at Kailua in October, 1819, at which men and women ate together in public for the first time. This was followed by the general burning of idols and temples throughout the group. Kekuaokalani, a cousin of Liholiho, put himself at the head of the adherents of the ancient faith, but was defeated and slain in the battle of Kuamoo, fought about December 20th, 1819.