Unknown 
The Complete Treatise on Gold (translated) [EPUB ebook] 

– This edition is unique;
– The translation is completely original and was carried out for the Ale. Mar. SAS;
– All rights reserved.
This is an alchemical tract, author unknown, although it does at one point mention a date during the 17th Century. Basically, it discusses gold; extracting its virtue, gold oil, how to make potable gold, etc.