Contrary to what Watson believed, Holmes won against Professor Moriarty at Reichenbach Falls, flinging him down the waterfall with the help of "baritsu", the Japanese system of wrestling, and then climbing up the cliff beside the path to make it appear as though he, too, had fallen to his death. This was a plan that Holmes had just conceived to defend against Moriarty's confederates. However, at least one of them knew that he was still alive and tried to kill him by dropping rocks down on the ledge where he had taken refuge. Hurriedly climbing back down the cliff—and falling the last short distance to the path—Holmes ran for his life and, by the next week, he was in Florence. Holmes apologizes to Watson for the deception needed to outwit his enemies, and describes his three years' exploits, explaining that he spent the next few years traveling to various parts of the world. First, he went to Tibet and wandered for two years, even attaining entry to Lhasa and met the "head lama". Afterward, Holmes travelled incognito as a Norwegian explorer named Sigerson. Then, he went to Persia, with Holmes entering Mecca, and then to a brief stopover with the Khalifa in Khartoum. Finally, before returning, Holmes spent time doing chemical research on coal tar derivatives in Montpellier, France. However, Holmes was finally brought back to London by the news of Adair's murder. During all this time, the only people who knew that Holmes was alive were Moriarty's henchmen and Holmes's brother Mycroft, who provided him with the money he needed.