Schönhals wrote his preface in 1821 - is this a printing error?

Schönhals' essay on Austerlitz was published in 1822, so 1821 seems to be right for the Feldzug (see also the date on page VI). And he was a Hauptmann in 1821:

http://www.literature.at/viewer.alo?objid=12540&viewmode=fullscreen&scale=3.33&rotate=&page=179

I haven't read his Feldzug 1805 - but maybe Schönhals was too critical in his judgements about the decisions of some of the Austrian commanders who were still alive, and therefore his essay wasn't published, forgotten, and rediscovered in 1873 ?