I have a feeling of delight and amazement when I become aware of something that I must have passed hundreds of times and not noticed. Cresby Brown or ‘Mr Red’ has been carefully recording Ordnance Survey benchmarks before they disappear.
Looking at http://benchmarks.mister.red/#rodborough I realise how unobservant I have been. There are 28 benchmarks photographed in Rodborough.
The term benchmark, or bench mark, originates from the chiseled horizontal marks that surveyors made in stone structures, into which an angle-iron could be placed to form a “bench” for a leveling rod, thus ensuring that a leveling rod could be accurately repositioned in the same place in the future.