Baker Rifle in Line Regiments

In De Witt Bailey's book, British Military Flintlocks 1740-1840, he mentions that some light companies in the era 1800-1815 received the venerable Baker Rifle. I have not seen this mentioned elsewhere, but Dr. Bailey is considered an expert on such things.

The other day I happened across an illustration from the later half of the 19th century showing a Hannoverian regiment in the British Army. If you look closely at the soldier in the in the center background, you can see that he is armed with a Baker rifle.  This is clear based on the shortness of the rifle versus the Brown Bess, the lack of a bayonet shoulder belt (and cross belt plate), but the patch box of the Baker is clearly seen.  

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