this is labeled quartet no.6. quartet no.4, according to an issue of Hofmeisters Monatsberichte from 1852?, may be opus 18 in B minor (Hm, not Bm, no worries about misreading Bfl minor) published by Ricordi, Mailand. (yes, I know, German for Milan-later edit) still no idea what quartet no. 5 may have been. Quartets 1 to 3 were published in 1846 by Ricordi (and may have been the same as the 3 earlier quartets we have uploaded in C, Gm, A♭.) Eric 04:22, 21 April 2011 (UTC) By the way, opus 18 is mentioned by Fétis/Pougin (Supplément et complément, Volume 2, p.302).
Re opus 45, since I am indeed trying to typeset it in score and parts though it will take awhile and so copyright issues would be good to try to settle earlier than later... well, the last quartet mentioned, by HMB, by Fétis, by others, as late as 1878 in one place, in 1881 by Fétis/Pougin...- of Pappalardo is opus 18 - in B minor acc. to HMB, and I am guessing not the same work (esp. since opus 18 was published in 1852 and op.45 was composed in 1856. time machine?)- unless someone finds it and it turns out to be this same work given "opus 45" in manuscript but transposed down a tone, or something... but really at this moment, pending yet further investigation... I am guessing opus 45 stayed in manuscript and perhaps even unperformed also . hrm. Eric 23:07, 28 April 2011 (UTC)