The author wishes to thank all those who have given him assistance in the preparation of this article, in particular, Norfolk Museums Service, Norfolk Records Office, Reg Eaton, Walter Grint, Ken Hawley, Philip Walker and Sheila Wyer. However, one person needs special mention and this is my close friend and associate Reg Fowle, whose knowledge of Griffiths' planes and marks is second to none and it was he who compiled the list of marks which forms part of this article.
Fig. 1,2,12 and 13 are reproduced by kind permission of the Norfolk Museums Service (Bridewell Museum). Fig 3 and 11 are reproduced by the kind permission of Norfolk Records Office.
Much of the information for this article has come from the Births, Baptismal, Marriage and Death records in the Norfolk Records Office, Norwich.