Washington, D.C., no date (ca. 1853-59). Mailing envelope free-franked by Sam Houston, presumably as a Senator from Texas, and addressed by him to George M. Conarroe, Esq. of Philadelphia. 3 x 5 in. (76 x 127 mm). In mat with an engraved portrait of Houston, and unexamined out of frame, 17 3/4 x 11 in. (451 x 279 mm).