The letter from Principal Chief Harry J. W. Belvin to Congressman Carl Albert expresses concerns about the handling of per capita payments to the Choctaw and Chickasaw Tribes of Indians. Belvin requests the establishment of a Correspondence Section to provide information to tribal members and address delays in processing claims. Belvin also criticizes the lack of communication and delays in making payments, urging for improved service to constituents. The letter highlights the need for a system to keep tribal members informed and requests the congressman's assistance in resolving these issues.