Ключевые слова: aged, astronomer, cancellation, card, celebrities, collection, commemorative communication, communication, correspondence, delivery, england, english, europe, famous, genius, great, history, isaac newton, letter, mail, mark, mathematician, memorial, men, nation, national, old, paper, patriot, philatelist, philately, philosopher, physicist, physics, portrait, postage, postal, postcard, postmark, retro, sir, stamp, symbol, vintage,