It is an interesting question to determine how credible the account of Dressler are, which looked pretty much convincing to me for the
Tagebuch in Dresden in March 1813
Bericht eines Augenzeugen von de Operationen des 4ten, 7ten und 12ten franössichen Armeecorps etc. vom 14. August bis 6. September 1813
Napoleon in Dresden
Zweites Heft (Is there - and there should be) - ein Erstes Heft !!
The battle of Dresden is covered - which happened at the 26th and 27th August und gives other interesting insights such as the work of Daru.
Interesting also is that on the front cover it is not
von F. v. D.
F. v. D.
There those two works would clash in date - it couldn't be the identical authors - either Dressler writes a complete fiction account about Napoleon in Dresden - but from where does he know the intricate detail about the structure of the bureau de administrations??
It there is a Erstes Heft - where is it??
Dressler and Guehery existed as Steve already pointed out