An extract from Morris, L., 1748. Plans of Harbours, Bars, Bays and Roads in St. George's Channel. The extract (page 42) describes the collection of sampier at Holyhead.
The extract reads as follows: ”Sampier, a well know Pickle, grows here in the Cliffs of the Sea Rocks; remarkable for this, that it hardly ever grows where Mean can come at it, without being let down in Ropes.”