Unused on cover / entire letter 1863 (Apr.) envelope per Margaret and Jessie to Heidleberg, Germany, rated "1/4" in red crayon and "1" in blue crayon, showing "NASSAU/PAID" c.d.s. in red for 11 April, partially overcancelled by Calais c.d.s. and oval-framed "PD" in red, and with London transit c.d.s. alongside, Paris/Strasbourg T.P.O. c.d.s. and two German transit d.s. on reverse. Photo