||6 Organ Trios
||6 Orgelstücke (original title)
||Merkel, Gustav Adolf
Not published as "trios" originally - the cover may be from a later printing. HMB and Hofmeisters Handbuch der Musikliteratur from the 1870s both list these as Sechs Orgelstücke.
I changed the title to "Orgelstücke", since it appears to be the original title (as listed as such in M. Saal's "G. A. Merkel: Leben und Orgelwerk").
Only the first piece is a true organ trio, so designating all 6 pieces as "trios" makes no sense.
The (currently) missing 2nd part ("Heft") contains 2 preludes and fugues (see Saal, page 364). - Rob Peters.