There has been much discussion about the Biarritz Hole concept with some postulating that Macdonald was copying a hole at the original Biarritz course even though no renderings of the entire hole are known to exist and there are no known writings of Macdonald articulating his philosophy of his interpretation of the hole.
However, Charles Banks, writing in 1929 about the 9th at Yale, a Raynor design and the most famous of the Biarritz holes, writes, "... or the Ninth, which is, in some features, suggestive of the Biarritz Hole."
"Suggestive," not copy, "suggestive," in "some features."
Fight amongst yourselves.
Anthony