Fallou and Lachouque and Fieffé and Marco de Saint-Hilaire all plundered the very same source: Perrot and Amoudru. Each added a little bit of this, a little bit of that. Fallou had access to numerous surviving items in the 1900s and his customers were essentially collectors, artists...so he did put more on uniforms.
Overall - a REAL history of the Guard still needs to be written - just even by combing finally through the memoirs.
A couple of facts I just found out:
- The Polish lancers actually started as young guard, and then the rule was to be that new units would start as young guard, then get promoted to middle guard and then to old guard. Their action at somo-sierra had Napoleon move them verbally (most orders in the guard were "verbal" from Napo himself) to old guard and grant them an eagle (only some form of fanion was planned and worn in the first place). The eagle came in only in 1811 along with that of the newly integrated dutch units (grenadiers and lancers). By 1812, the classification of the lancers was still dubious as in Bessieres' draft classification they are not indicated anywhere as precisely it is difficult to determine it !
- In 1813, it seems that the foot guard artillery went back to wearing shakos. The few bearskins they had left were given to other units - this explains why in some manuscripts one sees "guard grenadiers" wearing artillery bearskins and other such oddities one can spot in the Freyberg manuscript. I found this as notes in a never published series of Strasbourg paper soldiers.
So...let's be honest the best reliable source on the Guard is the original Perrot and Moudru (Histoire de l'ex-Garde), and vene it is far, far from being complete.
Prime topic for researchers...