At that time, there were people who said that they could see the future. They told a prophecy that Kamehameha would bring Hawaii together and even unite the people of Polynesia as far away as the Maoris in New Zealand. Kamehameha began to plan to unite all the kingdoms of the different islands. He started buying guns and bullets from British and American sailors who came to Hawaii while they hunted whales. Captain Brown began to bring him gunpowder from China and taught him how to it from sulfur, saltpeter, and charcoal on Hawaii. Isaac Davis and John Young stayed on Hawaii, married Hawaiian women, and taught Kamehameha's men how to use and fix guns.