"But my favorite writers, both of prose and verse, are British or Americans. They are A. Conan Doyle, Jack London, Mark Twain, Sax Rohmer, Jeffery Farnol, Talbot Mundy, Harold Lamb, R.W. Chambers, Rider Haggard, Kipling, Sir Walter Scott, Lane-Poole, Jim Tully, Ambrose Bierce, Arthur Machen, Edgar Allen Poe, and last, but no means least, yourself."
-- Robert E. Howard to H. P. Lovecraft, December 1932
"The mythical status of She is indisputable. As we all know, Jung went to it for the embodiment of an archetype. But even Jung did not, I think, get to the centre. If his view were right, the myth ought to function only for those to whom Ayesha is a powerfully erotic image. And she is not so for all who love She. . . . Ultimately the life of the myth is elsewhere.
The story of Ayesha is not an escape, but it is about escape; about an attempt at the great escape, daringly made and terribly frustrated. Its closest relative, perhaps its child, is Morris’s Well at the World’s End, which came ten years later. Both stories externalise the same psychological forces; our irreconcilable reluctance to die, our craving for an immortality in the flesh, our empirical knowledge that this is impossible, our intermittent awareness that it is not even really desirable, and (octaves deeper than all these) a very primitive feeling that the attempt, if it could be made, would be unlawful and would call down the vengeance of the gods. (...)
This hatred [of literary critics for Haggard’s novels] comes in part from a reluctance to meet Archetypes; it is an involuntary witness to their disquieting vitality. Partly, it springs from an uneasy awareness that the most ‘popular’ fiction, if only it embodies a real myth, is so very much more serious than what is generally called ‘serious’ literature. For it deals with the permanent and inevitable, whereas an hour’s shelling, or perhaps a ten-mile walk, or even a dose of salts, might annihilate many of the problems in which the characters of a refined and subtle novel are entangled."
Hammer was on a roll. Not only was Ursula Andress the star of She, but Christopher Lee (along with Peter Cushing) was one of the main supporting actors. Considering that he was an REH and JRRT fan, it wouldn't surprise me if Sir Christopher wasn't also an HRH fan as well.