Yes, I agree - one should be careful - particularly since later editions are listed, sometimes without appropriate notation. Also, I've found errors with opus assignments. But, on the plus side, there is normally detailed information on song-lists and first-lines, notably absent from Grove's, for the most part.
I believe- perhaps inaccurately though???... that
Hofmeisters Monatsberichte was closer to the 'music received by us this month' section of a music magazine than a Grove's worklist which goes some way to me anyway towards explaining some of the differences - for good
and ill
Having so much contemporary evidence of what music was being published from 1829 to 1947, is to a certain frame of mind (... mine for instance, and yours if I gather right
) - ... is without price (and practically free, too- yay libraries!), for all that, agreed, one must always understand one's sources and use them well and carefully, whatever they are, apologies for banality.
(Sorry- babbling. Carry on. Re the databases you mention - on IMSLP especially (even moreso than on en-Wikipedia) we are trying to compile worklists for composers with works with out-of-copyright works published (works the site can host) (or who arranged or edited such works), I think, based off Hofmeisters and any other sufficiently reliable sources available (Pazdirek, Groves, etc.) Started on a semi-sort-of-worklist of Samuel de Lange jr. yesterday, for instance. Yes, indeed, I think we would be interested though I can only speak for myself...
