red straightline postmark with manuscript date (1837) on large folded letter originating in London, England in September 1836, addressed to "Green Bay, Mich. Terr" (news had not reached London about the establishment of Wisconsin Territory), carried privately to New York City where it entered the mails, forwarded to Peoria, Illinois upon arrival in Green Bay, manuscript "$1.50" rate, despite the size this is actually one large sheet and was twice marked "Single Sheet" (despite weighing nearly two ounces),fine, rare and spectacular use