INVALID POSTING IN CALAIS: 1842 EL to London franked with imperf. JL 1d red (4-margins, nicked top left) posted in Calais (cds on front), stamp invalid in France so red "1/3[d]" tax charged + stamp partly over written by further "5[d]" charge in same ink. [Ex John Levett]Cross Reference: FRANCE, 1841 1d REDS (Image)