SmythSmyth, W. Descriptive catalogue of a cabinet of Roman family coins belonging to the Duke of Northumberland. (London, 1856). Available online: http://www.archive.org/details/cataloguefamily00smytuoft | SmythSmyth, W. Descriptive catalogue of a cabinet of Roman family coins belonging to the Duke of Northumberland. (London, 1856). Available online: http://www.archive.org/details/cataloguefamily00smytuoft |