An elementary treatise upon the theory and practice of the art of dancing, 1944 t.p. (Carlo Blasis; premier danseur) p. 6, etc. (b. 11-4-1803 in Naples, Italy; d. 1878; date of birth also given as 1797; dancer; name on facsim. of original French ed.: Ch. Blasis)
Encyclopedia Britannica, viewed on 17th June 2014 (Carlo Blasis, (born November 4, 1803, Naples, Kingdom of Naples [Italy] - died January 15, 1878, Cernobbio, Italy), Italian ballet teacher and writer on the technique, history, and theory of dancing. ...) http://www.britannica.com/EBchecked/topic/69003/Carlo-Blasis