Napoleon Series Archive 2014
Cavalry Uniform Design, August 26, 1804.
Cavalry Uniform Design Drawn by Ramón Murillo, August 26, 1804:
"Mounted forces stationed along the northern frontier of New Spain were known as “leather-jacket” soldiers
because of the up to seven layers of leather they wore instead of armor.1804":
http://online.nmhistorymuseum.org/threadsofmemory/documents/cavalry-uniform-design.php
Of possible interest:
http://miniaturasmilitaresalfonscanovas.blogspot.com/2013/07/nueva-espana-ejercito-regular-y.html