The Chemical Theatre, Vol. IV

By the same author original: "Ejusdem"; referring to Gaston Dulco from the previous page., Declaration of the Philosophers' Stone for his son Alboali. 586.
Master Ortholanus, The True Practice of Alchemy, proven and tested in Paris in the year of our Lord 1358. 1028. Ortholanus (also known as Hortulanus) was a 14th-century alchemist famous for his influential commentary on the "Emerald Tablet" of Hermes Trismegistus.
A New Light of an Experienced Youth, that is, a Treatise in which he names the Philosophers’ Stone. 1053.
Master Valentinus, most experienced, A Distinguished Work on both [the White and Red Elixirs]. Which he gave as a Testament to his adopted son, who also wrote this little treatise with his own hand. 1061. Basilius Valentinus is a legendary figure, often described as a 15th-century Benedictine monk, though the works attributed to him likely appeared in the late 16th century.
By an uncertain author, A little treatise on these words: For with flourishing study. 1076.
Likewise, A Work for the White. 1079. The "Work for the White" (Albedo) refers to the stage of alchemy that produces the White Stone, capable of transmuting metals into silver.
Saint Thomas Aquinas, A most excellent work, called the Book of the Blessed Lily. 1082. While Thomas Aquinas was a famous theologian, several alchemical works were attributed to him in the centuries following his death, though most modern scholars consider them pseudonymous.
By an unnamed author, A little treatise on the words: Mercury drinks the fleeting [liquid]. 1100. original: "Mer: fugidum bibit." Mercury is often described in alchemy as a "fugitive" or "fleeting" spirit that must be "fixed" or stabilized.
Likewise, A short work for the Red, with the Sun Gold by way of strong waters original: "aquas fortes." This refers to nitric acid, used in the purification and separation of precious metals.. 1112.
The Work of Peter of Silento, 1113.
An Anonymous Philosophical Treatise for the Red and the White. 1132. Referring to the two main goals of the Great Work: the White Stone for silver and the Red Stone for gold.
Paul Eck of Sulzbach; The Key of the Philosophers. Paul Eck of Sulzbach was a 15th-century German alchemist whose "Clavis" (Key) was highly regarded for its practical instructions.