BENCHMARKS continued
It should have been me! Benchmarker lived in this 'hood back in the '70s and even visited last year to check out the bridge. But it took M.C. to find it. It's on Hubband Bridge in Dublin City.
Below: The 'mark on Hubband Bridge.
Above: Hubband Bridge looking west, with the 'mark just above and within the black daubings near the centre.