Constans in 343. See p. 230.
See Bruce, 'Handbook to Wall' (ed. 1895), p. 267.
Such tablets, called tabulae honestae missionis ("certificates of honourable discharge"), were given to every enfranchised veteran, and were small enough to be carried easily on the person. Four others, besides that at Cilurnum, have been found in Britain.
None of the above-mentioned tabulae found are later than A.D. 146, which, so far as it goes, supports the contention that Marcus Aurelius was the real extender of the citizenship; Caracalla merely insisting on the liabilities which every Roman subject had incurred by his rise to this status.