Liv. 8.18.1; Diod. 17.74.1; Fast. Cap. (names entire, except Val[e]rius); Chr. 354 (Cotito or Potito et Marcello); Fast. Hyd. (Potito et Marcello); so also Chr. Pasc.; Oros. 3.10.1; Cassiod.; Degrassi 34f., 107f., 412f. They investigated numerous cases of poisoning (Liv. 8.18.4-11; Val. Max. 2.5.3; Augustin. CD 3.17; Oros. 3.10.1-3). Marcellus is the first of the plebeian Claudii. On Valerius, see Münzer, Gent. Val. 38, no. 10, cf. no. 12. (Broughton MRR I)