"Vol 4. folio 129". Photo" /> essay ½d. handpainted essay in purple-brown with lettering, etc., picked out in Chinese white, executed on tracing paper (68x94mm.) with a De La Rue dummy stamp, in the colour to be achieved, mounted below, dated "1 OCT 79" and marked<I> "Vol 4. folio 129"</I>. Photo | Christie's