A sketch of the key action

The picture shows Dominic’s contribution to the booklet, a diagrammatic measured sketch of the key action, which is most unusual, with keys which are weighted to rest under the key rails at the front, and the stickers resting not on the tail of the keys as usual in these chamber organs, but on a register with the stickers just above the keys.  Setting the action up involved an exact estimate of the effect the humidity might have on the key action.