, showing superb strike of the large red crowned circular "IMPROPERLY PUT UNDER COVER TO EVADE POSTAGE/TO BE/CHARGED", black Dublin arrival timestamp on reverse; vertical fold crosses the strike but barely detracts. This is one of the rarest of all Irish marks there being only two known examples. Photo" /> cover 1824 (20 Jan.) entire letter from London to Dublin inscribed<I> "Private"</I>, showing superb strike of the large red crowned circular "IMPROPERLY PUT UNDER COVER TO EVADE POSTAGE/TO BE/CHARGED", black Dublin arrival timestamp on reverse; vertical fold crosses the strike but barely detracts. This is one of the rarest of all Irish marks there being only two known examples. Photo | Christie's