William Stukeley,
Itinerarium Curiosum (Centuria I)
(1776)
“ This high ground is similar all along, having a steep descent westward, overlooking Nottinghamshire, and is a rock of93 rag-stone quite through; the stone is white, and rises in strata, thicker as deeper: the surface is heathy. The river Witham, which rises on the west of this ridge, must have run into the Humber, had not Nature, by her propensity of drawing it eastward, as her declivities generally run, broke it off in the middle by that great valley under Lincoln, and made a passage for it into the estuary. Hence it is that the stone upon this western cliff is full of sea-shells ”
