The RNRS lineage makes more sense to me, based on timeline and prior work, but I have no way of proving which is real.

Reaching out to Cocker and Dickson has resulted no feedback for me, except on Facebook, where I am told they prefer some local site over HMF :[ I tried to argue, but it was futile. Maybe someone more diplomatic and persuasive could try. It is not a strength of mine.