1851 Great Exhibition: Official Catalogue: Class X.: James Gisbourne
507. GISBORNE, JAMES, 37 Suffolk Street, Birmingham — Inventor and Manufacturer.
Cornopeans. Trombo conmta, or drawing-room cornopean. Sax horns in B flat alto, and E flat soprano.
Keyed bugle.
Long valve trumpet. Double sax horn in A flat alto, and E flat tenor: the performer while playing upon this peculiar instrument, can, by using the extra valve with the left hand, without taking the instrument from his lips, glide from the alto to the tenor cleff, and vice versa, with facility.