Haes, Hubert. „The Fiftieth Anniversary of Penny Postage.“. The Times (1890-yil 11-yanvar), s. 12. „It would be a very fitting celebration of the inauguration of penny postage if stamp collectors throughout the world were to combine in aiding to form a complete collection of stamps and such-like, to be deposited in the British Museum, so that England, where the great boon of penny postage originated, should have a complete record of what other nations have done, following its example... Mr. Walter van Noorden, whose intention it was that his collection of stamps, etc., should ultimately be presented so some museum instead of being broken up, gave me his collection to incorporate with mine, for presentation to the British Museum, to form the beginning of this proposed national collection.“.
