Colleagues, two points:
First, MEA CULPA! 112e was under SERAS (not Lamarque). Mucho apologies. That helps tell us something about Seras's formation (112e in the lead), but does not help with Lamarque/Broussier very much as both had elements of the 92e. The numbers should now add up. Sorry for the confusion.
Second, it was 9e de Ligne in Broussier's division, not 9e Léger. Does not seem the 9th de Ligne's history was published (have parts of Bohain/Puig in MS form from Vincennes). Curiously, the Historique of the 1st Ligne includes section on the 9th owing to a convoluted twist in the regiment's heritage, so there is a fairly good published version by Brasier du Thuy under the title "Armée Française: 1er Régiment d'Infanterie," 1889 (pp. 288-97 for 1809). Brasier du Thuy's text is very close to the MS history, but both clearly draw on MacD's and Broussier's reports, that is, they do not add much we do not already have in those two reports. What we can garner from these two regtls is:
- The 9th (3 battalions) and one battalion of the 84th were the ones Broussier formed in line at the front of the carré/colonne vide.
- These regtls report a loss of 22 officers killed and 18 wounded = very close to Martinien (indeed as close as one could hope to get all things considered).
the history of the 84e de ligne states that it formed the leading part, one would usually avoid to tear a unit apart - also the histoire would have told us that one part would have been deployed and the other ployed