cover Lincoln-Hamlin, blue embossed buff campaign cover to Prospect, Conn., circular design with portrait in center surrounded by split-rail fence and slogans in ribbon below (Milgram AL-88), franked with faulty 3c Dull Red (26), grid cancel (not tied), red 'Waterbury, Ct Aug 20 1860' double circle d.s., some soiling and slightly reduced at R., otherwise fine