Excellent, I’ve found the essay “The mystical philology of J. R. R. Tolkien and Sir Israel Gollancz: monsters and critics”. It’s in full-text Open Access at the Oxford University Research Archive. No need to pay $70 for it, in a copy of the latest edition of Tolkien Studies where it forms the lead essay.

I also found a summary on the author’s blog of the other interesting essay “Visualizing the Word: Tolkien as Artist and Writer”.

Though sadly the volume also contains the desirable “The Year’s Work in Tolkien Studies 2014”, which isn’t going to be Open Access any time soon.