This contemporary photograph shows Lord Rosse's giant 6 foot telescope in its heyday with an observer situated on a gantry at the top of a wall. It used a rather crude mounting and could only observe close to the meridian. T.R. Robinson favoured an equatorial mounting for this telescope but it appears that Lord Rosse found this too difficult to implement for such a cumbersome telescope. 
The Great Birr 6 foot Telescope
Armagh Observatory
Some of the workers at Birr with the Leviathan's mirror
See also:
The Telescope RestoredPainting of the Leviathan - artist unknown.
A Short History of Armagh Observatory
Last Revised: 2005 October 19th
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