An odd query, perhaps. Having read “Wildtrack” some time ago, I was surprised recently to discover, in Sarah Caudwell’s “The Shortest Way to Hades,” some detailed references to sailing that reminded me of “Wildtrack,” and even a boat named Sycorax. The coincidence struck me as curious. Is it mere coincidence, or were you consulted on the sailing passages of Ms. Caudwell’s book? Anne Coventry