"Relation historique des operations de la division Saint-Hilaire, le 19 avril 1809" Revue militarie, 2e année, 2e vol., Janvier-Decembre 1900. p. 168-172:https://www.google.com/books/edition/Revue_militarie_de_l_%C3%A9tranger/fOoIAAAAIAAJ?hl=en&gbpv=1&dq=%22Op%C3%A9rations+de+la+division+Saint-Hilaire%22&pg=PA168
Thank you both for this file. Love documents related to General Saint-Hilaire!
Couldn't download with the above address, it might well be in this gallica volume
https://gallica.bnf.fr/ark:/12148/bpt6k1236193/f5.image