section came to be known as Merille while the other referred to themselves as Pokotozek. The Pokotozek whose movements would have greatest impact on the Oropom, moved south, arriving at Nakiloro which lies on the lip of the Turkana escarpment just north of Moroto mountain, where they stayed for a short while before moving further south, proceeding down the eastern side of the Chemorongit and Cherangani mountains before finally branching off in the direction of Lake Baringo. This incursion disturbed Oropom who were settled around Baringo, causing a break-up of that group which led to migrations in various directions; Turkwell Some Oropom moved towards the Turkwell, both below and above Turkwell gorge. Uasin Gishu Other Oropom moved into Uasin Gishu Maasai held territory. According to Maasai tradition, an alliance of the Uasin Gishu and Siria communities attacked the Chemngal who then occupied the Plateau today known as Uasin Gishu. A Karamojong informant noted in 1916 that Nandi occupied territory previously stretched as far north as the sources of the Nzoia River i.e. Mt. Elgon, a territory that had been occupied by the Nandi as lately as the time of the grandfathers of that generation (i.e early to mid-19th century). The Karamojong raided the northern Nandi sections twice before the Nandi launched a big raid against them at Choo hill near the junction of Kanyangareng & Turkwel rivers. The Masinko clan of Karamojong who were pasturing here counterattacked and successfully drove of the Nandi raiders. In response to the Nandi raid, the Karimojong organized a powerful force to break up the Nandi nearest the Turkwel-Nzoia watershed but the expedition returned and reported that the Nandi had withdrawn too far south. The Karamojong were unmolested by the Nandi from that time and the Turkwel-Nzoia watershed became a no-mans land. Chemorongit Yet others moved to the Chemorongit mountains (Karasuk) which were still part of Oropom territory, as well as the area west of there and south of Moroto mountain. The Pokotozek finding that they were no longer facing a formidable tribal grouping to the north and west of Baringo, themselves expanded in that direction, expelling other Oropom from the Cherangani mountains and further west right up to the slopes of Mt Elgon hence limiting Turkana southern movement. It is notable that the emerging Sebei referred to the Mt Elgon Oropom as Sirikwa. The Sirikwa population at Mt Elgon, as evidenced by Sirkwa holes,