blue label affixed to a cover to England cancelled by "Returned from "Girl Pat"/as illegal mail" straight-line h.s. in red, also bearing British Guiana KGV 4c. cancelled by red and blue crayon strokes; tear to cover at top and a few tone spots, however unusual and very rare. Photo" /> cover 1937 (c.)<I> "Girl Pat"</I> blue label affixed to a cover to England cancelled by<I> "Returned from "Girl Pat"/as illegal mail"</I> straight-line h.s. in red, also bearing British Guiana KGV 4c. cancelled by red and blue crayon strokes; tear to cover at top and a few tone spots, however unusual and very rare. Photo | Christie's