 More’s new theological emphasis is also evident in the rather different attempt to reach a wider audience, this time a learned Latinate audience across Europe, which he published in 1671, his Enchiridion metaphysicum. The Manual of Metaphysics is a major re-statement of More’s views on incorporeal substance, or spirit. The main claims are familiar from his earlier philosophical works, therefore, but there are two new, and highly significant, features. Firstly, More fully develops his ideas on absolute infinite space and presents it as a major exemplar of incorporeal spirit (Koyré 1957, Reid 2007, 2012). Secondly, while drawing on contemporary experimental natural philosophy to provide him with examples of phenomena which cannot be explained solely in terms of matter and motion, More explicitly draws upon a specific experiment performed by Robert Boyle, and published by him in his New Experiments Physico-mechanicall touching the Spring of the Air (1660). If Boyle knew of More’s Immortality of the Soul (and it is almost certain that he did), he never troubled to comment publicly upon it. Once his own experiments, and his own name, were deliberately invoked to support More’s philosophical theology, however, Boyle could not let it pass (Henry 1990).