I found these at a wonderful site called Matte Shot, a tribute to golden age special effects artists. The third image shows the matte as it appears in the film, and you can see a lot more at the link, including a miniature of the castle. Took got his start at Britain’s Pinewood Studios, and his first mattes appear in Warlords of Atlantis (1978), the oft-forgotten (and still unreleased on DVD in the U.S.) fourth fantasy-adventure directed by Kevin Connor and starring Doug McClure.
Took went on to work on classics like Clash of the Titans (1981), The Adventures of Baron Munchausen (1988), and Batman (1989). More recently, he has worked as Miniature Effects Supervisor on The Wolfman (2010) and The Monuments Men (2014). He was also Visual Effects Supervisor on my favorite horror film of the last 15 years, Neil Marshall’s The Descent (2005).