Columbia subject headings:
Harvard subject headings:
Coal trade--England--Newcastle upon Tyne--History--Sources.
Gardiner, Ralph, 1625-
Newcastle upon Tyne (England)--History--Sources.
Tyne, River (England)--Navigation--History--Sources.
Princeton subject headings:
Coal trade--England--Newcastle-upon-Tyne--History.
Gardiner, Ralph, 1625-