Catalogue of the R[obert] P[atrick] V[ernon] Brettell collection of coins of Exeter, and Civil War issues of Devon ... [10/28/1970]
Scanned at American Numismatic Society library. Priced. Pages 3-27 contain a "tour-de-force" essay by Ian Stewart on "The Exeter Mint and its Moneyers." See also the off-print copy in the Pamphlet File.