David undertook a lot of restoration work on the historical telescopes at Armagh Observatory…
http://star.arm.ac.uk/history/Domes/Sinden/
http://star.arm.ac.uk/movies/Grubb15inch/
http://star.arm.ac.uk/history/Domes/15inch/Jan/
http://star.arm.ac.uk/history/instruments/Calver/Calver.html
John