The Ulsterior Motive
"The Ulsterior Motive" is the title of an unpublished essay by J.R.R. Tolkien written in 1964. The essay derived from a critique of the posthumous publication of C.S. Lewis's Letters to Malcolm.
It was not for some time that I realized that there was more in the title Pilgrim's Progress than I had understood (or the author either, maybe). Lewis would regress. He would not re-enter Christianity by a new door, but by the old one: at least in the sense that in taking it up again he would also take up, or reawaken, the prejudices so sedulously planted in boyhood. He would become again a Northern Ireland protestant.