Old English double curtail
The next step in the evolution produced the double curtail, a converted bass pommer an octave below the single curtail and therefore identical in pitch as in construction with the early fagotto in C. The instrument is shown the figure, the reproduction of a drawing in the MS. of The Academy of Armoury by Randle Holme,[16] written some time before 1688.
Barrel Organ
Large stationary barrel-organ worked by hydraulic power, from Solomon de Caus, Les Raisons des forces mouvantes (Frankfort-on-Main, 1615). The origin of the barrel-organ is now clearly established, and many will doubtless be surprised to find that it must be sought in the Netherlands as early as the middle of the 15th century, and that accurate and detailed diagrams of every part of the mechanism for a large stationary barrel-organ worked by hydraulic power were published in 1615