P. O'Farrell's 'Collection of National Irish Music for the Union Pipes', was entered at Stationer's Hall, and published in London in 1804. The title page illustration shows O'Farrell playing the pipes in a production of 'Oscar and Malvina' (but the original score says that Mr. Courtney was the piper in the original production). The first 16 pages are a description of the pipes, and how to play them. O'Farrell followed up this with 'O'Farrell's Pocket Companion for the Irish or Union Pipes, in 4 parts, London (1805-10)What was secret? [I have the facsimile reprint of the former and have seen the first 3 parts of the latter.]

Francis o'Neill, 'Irish Music and Musicians' noted of the cuisle pipes, 'as the pressure on the bag to expel air is exerted by the forearms or wrists- hence,cuisle, or pulse.'