L'Hotte, Alexis Francois, 1825-1904. Un officier de cavalerie: souvenirs. Librairie Plon, 1905. 406 p:
http://books.google.com/books?id=O14FAAAAMAAJ
The great French rider - The first ca 50 pages discuss his education.
His recent Bio:
Nelson, Hilda. Alexis-Francois L'Hotte: The Quest for Lightness in Equitation. London: J. A. Allen, 1997. ISBN: 0851317057