Plaque: Zeppelin bomb
The round stone in the roadway opposite this point marks the spot where, on Wednesday the 13th October 1915, at 9:25 pm a bomb from a German zeppelin struck the ground and exploded, shattering the chapel windows and doing other material damage.
Site: Zeppelin bomb (1 memorial)
WC2, Old Square, Chapel
In the photograph the plaque is just to the right of the arch.