Dates from Alexandre Boucher data.bnf.fr.
Retrieved 17 March 2018. In Paul Nettl's Beethoven Encyclopedia the dates are 1778–1861. In George Grove's A Dictionary of Music and Musicians (1900) the dates are 10 April 1770 – 30 December 1861. In Dictionnaire de la conversation et de la lecture the date of birth is 11 April 1770.
gallica.bnf.fr
Paul Nettl. "Bouché, Alexandre" in Beethoven Encyclopedia. Philosophical Library, New York, 1956. Manuscript at the B.N. France.
books.google.com
Boucher, Alexandre-JeanDictionnaire de la conversation et de la lecture, Volume 7 (Belin-Mandar 1833), p. 440.
Page 254 John Warrack, Carl Maria von Weber (2nd edition 1976, Cambridge University Press); it includes a quotation from Carl Maria von Weber: The Life of an Artist by Max Maria Weber, vol. 2, p. 327.
