... with an overburden of viscous mud of a vaseline consistency varying in depth to about 12 ft. The rock floor has the characteristic stepped formation due to the eroded laminations of successive lava flows, and has a westerly dip of the order of S". At the surface the rock varies considerably in hardness; also...

... worka t Silloth, about mile in length, and consisting of a framework of steelsheet-piling coveredby an in-situconcrete stepped apron supported on imported filing, together with the driving of eight home-grown elm timber groynes, each 200 feet long, all work being carried out in tidal waters...