Carl (Karl) Gottlieb (Gottlob) Reissiger (enough alre.. I ... erm) (1784-1859) was a composer, not quite a contemporary of Beethoven or Schubert's, who wrote much music to be played by amateur chamber music lovers and pianists, more "serious-minded" works for the same groupings, and works for other ensembles too (at least ten settings of the ordinary of the Mass, the tenth of which was republished recently; at least one symphony; for example.) Very little-known now (not even the English Wikipedia has an article on him yet, I think- I intend to rectify that- though the German-language one does) but some of the larger college libraries have a work or two of his still in their collection.
(The university where I work has early-publication - 1840s - scores of two of his piano trios, for example, and some other works.)
Some of the images in my gallery were created by me after borrowing one of the piano trios we have in our library and using the free-license program LilyPond to create a new edition of Reissiger's score. I stopped all such projects for a month or so first when tackling some other projects with the same program that I have permission to work on but for copyright reasons, not share; then while visiting my parents (the computers there don't have LilyPond installed yet) and then thirdly, when I got back, because of illness and lack of mental strength- but I feel a bit like seeing if I might "rev up" by, say, creating a page with the last 20 bars or so of the Reissiger score. That might be the next image I upload, if I get it to work. Will see.