Sir John Retcliffe was the pseudonym of the German writer Hermann Ottomar Friedrich Goedsche (February 12 1815 Trachenberg, Silesia - November 8 1878 Warmbrunn, today Cieplice Śląskie-Zdrój in Jelenia Góra) primarily remembered for his antisemitism and the extent to which his fiction indirectly contributed to "The Protocols of the Elders of Zion". Wikipedia
Das Pseudonym Sir John Retcliffe verwendete er, um den Lesern Authentizitt der von ihm geschilderten "Hintergrundinformationen" aus dem feindlichen (englischen) Lager zu suggerieren. www.ablit.de/7retclif/1.htm
...fancy British penname, 'Sir John Retcliff.' Goedsche was a postal employee. As part of his Secret Police work he forged letters which were used as evidence to frame a ... emperors-clothes.com/letters/ringstrue.htm
The definitive Wikipedia entry for Sir John Retcliffe. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Sir_John_Retcliffe