De La Rue had been regarded as the leading banknote paper manufacturer in the world, having manufactured banknote paper for the Bank of England since 1724. In 1997, De La Rue acquired Harrison and Sons, the stamp and banknote printers based in High Wycombe. The factory closed permanently in 2003. In early 2002, De La Rue took over ownership from Smurfit Diamond Packaging Corporation of Sequoia Voting Systems, a California-based company that was a large provider of electronic voting systems in the U.S., for U.S. $23 million. After losing money for three years in a business way out of the company's traditional lines,
Warren De la Rue memoirs, entitled "Researches on Solar Physics", published by De La Rue, in conjunction with Professor Balfour Stewart and Mr B Loewy, in the "Phil. Trans." (vol. clix. pp. 1–110, and vol. clx. pp. 389–496). He took some of the very first photos of the moon, so he got a crater named after him the "De La Rue (crater)". In 1860 De La Rue took the photoheliograph to Spain for the purpose of photographing the total solar eclipse which occurred on 18 July of that year. This expedition formed the subject of the Bakerian Lecture already referred to. The photographs obtained