ClipArt ETC
"Sea-walls. A. Plymouth (England) breakwater; a, a, level of the top; b, b, low water at spring tide; c, bottom; d, foreshore; e, sea-slope; f, top." -Whitney, 1911

Plymouth Breakwater

"Sea-walls. A. Plymouth (England) breakwater; a, a, level of the top; b, b, low water at spring tide;…