I see the 29e ligne (one (1) bat) is listed in Nafziger's OOB on page 353 of Napoleon at Leipzig. He also has GdB Pierre-Jacques Ostens as the brigade cmdr. at Gohrde. Osten is also listed on p 352, with GdB Jean-Jacques Avril, as being in Hamburg on the 15th of September! This should be our man Mielzynski at Gohrde!