Folklore

Robin Hood’s Butts (Brow Moor)
Round Barrow(s)

“A couple of tumuli near the Bay are called “Robin Hood’s Butts,” at which, it is stated, he exercised his men in archery.”
p114 in ‘A glossary of Yorkshire words and phrases collected in Whitby and the Neighbourhood. By An Inhabitant. 1855. You can read this on Google Books.