Mercurius centralis: or, A discourse of subterraneal cockle, muscle, and oyster-shels, found in the digging of a well at Sir William Doylie's in Norfolk : many foot under ground, and at considerable distance from the sea. Sent in a letter to Thomas Brown, M.D. by Tho. Lawrence, A.M. - Lawrence, Thomas (printed by J.G. for R. Royston, and are to be sold at the Angel in Ivie lane, 1664)