waving flag and floating globe red and patriotic design with verse below ("Then conquer we must, when our cause it is just..."), franked with 1857 1c Blue and 3c Dull red (faded), "Philadelphia Pa Jun 17 1861" octagonal datestamp, addressed to soldier in 20th Pennsylvania Infantry Regiment, light wear and toning, fine and scarce to-the-mails carrier use on a patriotic envelope