items in collections of famous stamp collectors, including Sir Ernest de Silva, Henry J. Duveen, Arthur Hind, William Beilby Avery, Alfred F. Lichtenstein, and Alfred H. Caspary, among other philatelic luminaries. The future King George V paid £1,450 for an unused blue Two Pence "Post Office" at an auction in 1904, which was a world record price at the time. Adjusting by inflation rate it is about £ in . The next day, one of his secretaries reportedly commented that "some damned fool" had paid a huge amount of money for one postage stamp, to which George replied, "I am that damned fool". By 2002, the "Mauritius blue" was estimated to be worth £2 million. The greatest of all Mauritius collections, that of Hiroyuki Kanai, included unused copies of both the One Penny and Two Pence "Post Office" stamps, the unique "Bordeaux" cover with both the one penny and two pence stamps which has been called "la pièce de résistance de toute la philatélie" or "the greatest item in all philately", and numerous reconstructed sheets of the subsequent issues. Kanai’s collection was sold by the auctioneer David Feldman in 1993, the Bordeaux cover going for the equivalent of about $4 million. In July 2021 at Christoph Gartner's 50th auction sale, a 'Ball Invitation' sent by the Governor's wife, Lady Gomme, sold for over 11 million euros (including buyers commission) making it the most expensive philatelic item ever sold at auction. Subsequent issues The subsequent issues are discussed in Postage stamps and postal history of Mauritius. Reprints and forgeries The "Post Office" stamps have been reprinted from the original plates and, like many other rare postage stamps, have been forged many times. In popular culture One of the "Post Office" stamps is the MacGuffin in a 1962 episode of The Avengers titled "The Mauritius Penny". Theresa Rebeck's play Mauritius is about two sisters who inherit a stamp collection perhaps worth a fortune, which includes both the deep blue two penny and the orange one penny "Post Office" stamps (to which the title refers). One of the Billy Bunter novels is titled "Billy Bunter and the Blue Mauritius", where the blue two pence stamp is stolen and recovered. The Case of the One-Penny Orange (1977) by E. V. Cunningham, the pen name of Howard Fast was the first of a series of novels in which Beverly Hills detective Masao Masuto is assigned