On 31 December 1831 Robinson and his group of about 14 black envoys negotiated the surrender of 28 members of the Mairremmener people, an amalgam of Oyster Bay and Big River tribes. The tiny group of 16 men, nine women and a child, led by Tongerlongter and Montpeliater, was all that remained of what had once been one of the island's most powerful clans and much of Hobart Town's population lined the streets as Robinson walked with them through the main street towards Government House.[58] They were sent to the Wybalenna settlement on Flinders Island, joining another 40 Aboriginal people who had previously been captured, although another 20 interned on the island had earlier died. By late May many more, including Kickerterpoller and Umarrah, had also contracted influenza and died.[59]