So, thanks to A. and D. for sending me to the link where I cd watch Verlyn's talk to the Tolkien Society on the 10th.
It's basically a look at Tolkien's use of negative space in his mythology. Taking Becket's WAITING FOR GODOT as her touchstone, with its characters on stage constantly awaiting the arrival of of someone who never shows up, Verlyn suggests the lack of The Tale of Earendel may be intended. A real mythology needs gaps, lost material, and Tolkien's failure to provide any full text of Earendel's story looks to her as deliberate, particularly (she notes) because Tolkien put in a number of references that shd lead up to the tale but stop short just where the Tale (or Lay) shd start.
I don't think I agree, at least not without going away and mulling over the argument for a good while.* As so often with Verlyn, who asks the difficult questions, it's thought-provoking and very well written. I conclude that we're going to need a third volume of her collected Tolkienian essays, to go with GREEN SUNS and ALWAYS BE A FAIRY TALE, somewhere down the line.
Here's the link:
--current reading: Bebergal's APPENDIX N
*I think it's more a matter of ambition on Tolkien's part: he had the habit where he'd no sooner start a Tale than he'd stop and re-plot it as part of some vastly expanded schema (cf. The Lay of Earendel, THE LOST ROAD, &c), after which the original tale in-progress tended to languish.