I was walking by Captain Cook's monument on Saturday. Intrigued to know what the 'Legend of Roseberry Topping' is!

You probably don't have time to learn it now, but I sing a version of 'Scarborough Fair' from Goathland (via Cecil Sharp) which has a lovely mysterious tune, and which I occasionally use in Supernatural-themed presentations (it was a supernatural ballad in its older forms, after all).