For the last couple of weeks I have been in Oxford giving the John Locke Lectures on Constructing the World. The title is an homage to Rudolf Carnap's 1928 book Der Logische Aufbau Der Welt. The lectures are based on a book I have been writing for the last couple of years, trying to execute a project that is reminiscent of Carnap's in certain respects. I haven't put this material online until now in order not to pre-empt the lectures, but I will be putting chapters online as I give the corresponding lecture each Wednesday. So far you can find the introduction and the first three chapters. Also, the Oxford website has audio for lecture 1 and lecture 2, as well as slides and handouts. More of this material will go online each week, and I'm told that there will eventually be video too. It has been very good to be back in Oxford, and I'm grateful to everyone here for their hospitability to date.