In September 2014 Dr Mark Thakkar took up a Leverhulme Early Career Fellowship for three years to work on a new edition and English translation of John Wyclif’s Logic. His mentor during the Fellowship is Professor Stephen Read. Written in the 1360s, the Logic blends philosophy with science and theology, covering topics like optics, geometry, digestion, planetary motion, atoms, time, space, and God’s foreknowledge. Its breadth should have made it a valuable source for intellectual historians, but it has hardly been studied because the nineteenth-century edition is so defective as to be frequently unintelligible. Advances in medieval scholarship, including the discovery of better manuscripts, will enable Dr Thakkar to make it more readable and widely discussed than it has been for six hundred years.