Copy of letter, from Carl Friedrich Gauss to Sir John Herschel, dated at Göttingen Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Many thanks for his communications, especially for the one on light. This may be translated into German by J. E. E. Schmidt, and he would be grateful if John Frederick William Herschel would authorize this to be done. 31 October 1828