25c dark blue 'Hidalgo' postal stationery envelope (UPSS #E3, H&G B3b) with '2874' district number and 'MONTERREY' district opt used with oval FRANCO EN MONTERREY cancel in blue dated 9 JUL 1874. Addressed to SAN ANTONIO, TEXAS, USA and unclaimed with a variety of markings including oval 'UNCLAIMED', circular 'DUE 1', circular 'ADVERTISED' and unframed 'DUE 3' all on front with EAGLE PASS TEX cds dated JUL 17. Reverse bears SAN ANTONIO arrival cds and blue DEAD LETTER OFFICE U.S. marking dated OCT 20 1874. A rare use of this envelope addressed overseas.