I have attempted to give a full list of sources in the footnotes.  Reference codes have been given for all materials where these are utilised by the archive concerned, except those referring to the correspondence of Phillips held by the National Museum of Wales as these were under revision as a result of work here.

BGS: British Geological Survey

GSM: Geological Survey Museum, Keyworth

Cambridge Adds: Cambridge University Library

HL&PS : Hull Literary and Philosophical Society

HST: Hugh Torrens Collection, Department of Geology, University of Keele

NMW: Henry De la Beche Archive, Department of Geology, National Museum of Wales, Cardiff

OUM Phillips: John Phillips Archive, Hope Library, Oxford University Museum

OUM Smith: William Smith Archive, Hope Library.

Scarborough Rotunda: Scarborough Museums

SL&PS: Scarborough Literary and Philosophical Society, Scarborough Local Studies Library

WL&PS: Whitby Literary & Philosophical Society, Whitby Museum

YPS: Yorkshire Philosophical Society, Museum Gardens, York