http://books.google.com/books?id=i_8aAAAAYAAJ&pg=RA2-PA674
His promotion to CdB can be found on p 435 of
Correspondance de Joachim Murat: chasseur à cheval, général, maréchal d'empire, grand-duc de Clèves et de Berg (juillet 1791 -juillet 1808) By Joachim Murat, Albert Lumbroso. Published by Roux Frassati, 1899. 512 pages.
Sorry, I have been away.