it occurs to me I should ask this here too- TP Ryder (published in 1878) and several other composers, I think, in the 19th century wrote transcriptions and variations on a piece they called "Pleyel's hymn". (No, it's not the "St. Antony theme" by Haydn that's I gather probably not by Pleyel or Haydn and which Brahms varied in his op.56.) As to the Pleyel hymn, see
Ryder's work @ IMSLP (or find it at
LoC.)
Does anyone (I don't! not a "rhetorical question.") recognize the origin of this theme (by Pleyel or by anyone else)- who by and what work by them?

(I am guessing Ryder did not write it himself- but I could be mistaken...)
Eric S.