James Ayres English Naive Painting 1750-1900 Thames & Hudson 1980, illustrated as plate 92
James Ayres British Folk Art Barrie and Jenkins, London 1976. Overlook Press, Woodstock, N.Y. 1981, plate 140.
Margaret Gill Proffessor of Perculiar Art Tunbridge Wells Borough Council Publication.
Another copy of this picture and other examples of George Smarts work, The Goosewoman and The Postman, were sold in these rooms as part of the Judkyn Pratt Collection of British Folk Art, 8th November 1995 (lots 53-57). James Ayres notes that The Earth Stopper is possibly the only work of Smarts which is adapted from an engraved source as it bears a likeness to Nathan Drake's The Earth Stopper engraved by V.Green in 1767.
An engraving showing Smart's Repository in Frant is illustrated in Clifford's 'Tunbridge Wells Guide' of 1840.