From the Enlightenment to philosophy of mind in the mid-twentieth century, two distinct trajectories can be distinguished, both of which are relevant to our story in different ways: the development of experimental neuroscience, and the gradual recognition that materialist philosophy should concern itself with the status of the brain. If classically, materialism as a thesis about the world was distinct from materialism as a brain-mind theory, some historical cases complicate that distinction, such as the debate on Locke on thinking matter. But nevertheless, it is a very operative distinction (also made by eighteenth-century critics). How do we get from that, to the "vulgar materialism" of the nineteenth century (Vogt, Moleschott, but already Cabanis in 1800), with the idea of the brain secreting thought? And how, from that, to brain-mind reflections in the twentieth century? I can only suggest some pathways …