PHOTOGRAPHY PIONEER WILLIAM HENRY FOX TALBOT---THE "PENCIL OF NATURE"-------TALBOT'S PROCESS OF TREATING PAPER WITH VARIOUS CHEMICALS AND CAPTURING AN IMAGE THROUGH THE ACTION OF LIGHT AND CHEMISTRY-----FINE DESCRIPTIONS!........also..........CASH FOR NEGROES--RUNAWAY SLAVE ADS----FINE DESCRIPTIONS!.......An Original & Complete Issue of THE NATIONAL INTELLIGENCER dated  MARCH 7, 1839.........FINE REPORTS THROUGHOUT!..