British Library MS. Sloane 870. Paper. Folio. 14 folios. 17th Century. f227 Roberti Fludd, sive de Fluctibus, tractatus de instrumentis mobilibus oblongis, et de variarum machinarum descriptione, earumque motus ratione, scilicet libri duo priores, ultimo capite omisso, partis septimae tractatus ejus secundi de motu; figuris illustrati. [Printed in his book 'De naturae simia', ed. Francofurti, 1624, p.435.]