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[In]victo Mithrae d(onum) d(edit) M(arcus) Umbilius Criton cum Pyladen vil[ico].
Criton (ct. inscr. No. 231) probably was a libertus of M. Umbilius Maximinus (CIL XIV 177 and 251) who was a patronus of the corpus lenunculariorum tabulariorum auxiliariorum, ostiensium in 192 A.D. cf G. Barbieri, l'Albo senatorio di Settimio Severo a Carino (193-285) Roma 1952, 184f.
It may be significant that in the nearby Serapeum an inscription from 200 AD mentions a son of M. Umbi…