Contents The letter is attributed to Ramon Llull (c. 1232-c. 1315), a polymath of great fame who paved to way to subsequent knowledge in many fields such as mathematics, logic, and theology. Several texts have been falsely attributed to Llull and started to circulate under his name from the 14th century; many of these texts concern alchemy. This particular letter deals with the process of shortening (accurtatio) the processes needed in order to obtain the...