This volume contains a newly-edited exposition on the Mystical Theology contained in MS UV6 of the Biblioteca degli Intronati in Siena. The MS attributes the work to the abbot of Vercelli (Thomas Gallus), but this is shown to be a false attribution. A commentary on the Canticle of Canticles has also been attributed to Thomas Gallus but argued against by J. Barbet in Brepols' SRSA volume 10 (2005). This commentary is reprinted and accompanied with the first ever English translation. A treatise on the Seven Steps to Contemplation in Latin with an English translation is the third text. An introductory critical study evaluates all three works and argues that they all belong to the same author, pseudo-Thomas Gallus.