Here is an 1821 entry from the ledger of J.C. Bishop (1783-1854) for a chamber organ for a Mr. Wilson, whose address is believed to been Bouverie Street, London. I have supplied the bracketed pitches of the stops; none appear in the source.

The "additional Row in a Line" refers to a duplicate keyboard provided for the performance of organ duets. The "Second Sett" was presumably an enclosed Swell division.

The Organ to be from GG to G in alt. with an additional Row
in a Line for a Second Performer from F.
 
The Great Organ to contain
     (8)       Open Diapason Thro in Metal
     (8)       Stopt         do
     (4)       Principal
    (2 2/3)    Twelfth
     (2)       Fifteenth
     (8)       Bafsoon
     (8)       Dulciana
     (8)       French Horn from F
 
Second Sett
     (8)       Open Diapason
     (8)       Stopt Diapason
     (4)       Flute
     (8)       Claribella
     (8)       Hautboy
     (8)       Cremona
 
£504

This stoplist is distinctive in its concentration on solo colours rather than choruses - there is no Great mixture or Swell Principal. The Claribella, newly-invented by Bishop, is present, and a French Horn replaces the usual Trumpet. The Swell is an attractive collection of solo and accompanimental registers.


SOURCE:
'Bishop and Son Organ Builders', Laurence Elvin, Lincoln 1984.