Indian Reform.- A Buffalo paper of Sept. 18 says, a letter from the mission establishment at Carey, Rev. Mr. M'Coy, had left that place on a tour of observation to the west,-to ascertain the local advantages of the territory, bounded east by the Missouri river and the State of Missouri, and west by the great American desert, for the settlement and colonization of the Indians scattered over the northern states and territories of the United States. Mr. M'Coy last winter gave to the public a pamphlet entitled 'The practicability of Indian reform, embracing their Colonization.' - This work probably drew the attention of government, and Mr. M'Coy was directed to make an examination of the country in question.