I located a work by Luitpold Lutz, Die Bayerische artillerie von ihren ersten anfanger bis zur gegenwart. Hauptmann von Perchinger commanded the 97 man artillery company in Kufstein in 1809 (page 49). Brack commanded the artillery park in 1807, then commanded an artillery company with 20 guns that formed part of the garrison of Salzburg after the Austrians were driven out on 29 April 1809 (pages 44 and 49).