London, Wellcome Institute MS. 1701. 9 folios +1999 [1001] pages + 2 folios. 110x80mm. 17th Century [1689.] Coenders van Helpen, Fredericus. Le soleil terrifié par l'art métellique. Méthodiquement traitt‘par un Amateur de la Vérité. Eb debes pulchra ferundo scire. Per anagramma Fredericus Conderus ab Helpen. 1689. [Author's holograph.] [An alchemical encyclopaedia in 29 chapters, made up from extracts in Latin and French from a very large number of alchemical authors of all periods.]