1861 (Sep 11) Wrapper to Christiansted with 1856 3c vertical pair, with yellow gum from St. Thomas, clear to very good margins, top stamp with small imperfections, have been lifted and replaced, tied by concentric circle cancelled with Frederiksted cds adjacent, the cover is aged with some ink corrosion and reinforcement, noted in cert. that pairs on covers are very rare, cert. Möller (2007)