Where else would it be? I suppose it might've been shipped to the middle of the desert in Arizona, as such things are, but it seems unlikely in this case :)
"The photo below of the Islington tunnel keeper, could be of Mary Rockingham, who took over the job in 1902 from her husband. She lived in the two roomed cottage against the wall of the bridge, marshalling the barges and sometimes taking the horses over the hill."