Allan Line Steamship "Peruvian", Quebec September 3rd - Londonderry September 11th 1864. Liberty & Shield Patriotic envelope posted unpaid at Fond Du Lac, Wisconsin on August 31st 1864. Addressed to Niederurnen, Switzerland near Zurich. Routed through the Detroit exchange office on 1st September to receive the "DETROIT MICH/3/SEP 1" exchange marking to be put onto the Peruvian at Quebec. Reverse bears the "AARAU - ZURICH / Z.14 / 15 D. / 64" transit stamps. Atlantic Transit of 8 days., Very Fine. Estimate  $1,500 - 2,000. $0 (Image)