2010
TQ2854 : Merstham Tunnel observatory
taken 15 years ago, near to Hooley, Surrey, England
This is 1 of 2 images, with title Merstham Tunnel observatory in this square

Merstham Tunnel observatory
This was built as a surveying platform to facilitate the setting out of the railway tunnel and its construction shafts. The Engineer's report to the board of the London and Brighton Railway dated 8th August 1838 has "The observatory will be completed in a few days, when the tunnel shafts will be immediately set out." The tunnel opened in 1841. Its air vents are quite unlike this tower, much squatter - see TQ2854 : Merstham Tunnel air shaft.
