 Cera unearthed the bamboo pieces.Together with the natives, whom he trained prior to the gathering of materials, he proceeded with the construction of the organ.The organ was playable in 1821, secretly working with Swiss chemist Jacques E. Brandenberger, who was employed by Blanchisserie et Teinturerie de Thaonbut, the cellophane inventor for the air bags to be used in the construction but without the trumpet stops.