%0 Generic %T Pay of mail-contractors in the late insurgent states. Letter from the Secretary of the Treasury, in answer to a resolution of the House of April 18, 1871, in relation to any appropriation out of which mail-contractors may be paid for carrying the United States mails in the late insurgent states prior to May 31, 1861 %U https://ezaccess.libraries.psu.edu/login?url=http://congressional.proquest.com/congcomp/getdoc?SERIAL-SET-ID=1510+H.exdoc.41