 Although Kilvington does not enjoy the reputation in natural philosophy that he does in logic, recent research reveals that his questions on Aristotle’s De generatione et corruptione and Physics inspired Thomas Bradwardine’s theory of motion and his famous rule of the proportions of velocities in motion (see Jung 2022a). Both works stemmed from lectures Kilvington delivered in the Arts Faculty before 1328, i.e., before Bradwardine’s famous treatise On the Proportions of Velocities in Motions.