BENCHMARKS continued
This one
from Michael Byrne is on an old gate pillar opposite Martello Terrace
in Blackrock, County Dublin, and close to the eponymous tower itself.
Below: A 'mark near the Martello Tower at Blackrock.
Above:
Near the Martello Tower and looking south east towards Blackrock Park
with the 'mark on the face of the second block up of
the pillar.
