Note 966 — Chapter XII · THE WORSHIP OF MITHRAS
Reading edition
Cumont, T. et M. I. p. 318, n. 1, points out that an initiate might become Pater Patrum immediately after being made Pater or Pater sacrorum simply. This appears from the two monuments both dated the same year of Vettius Agorius Praetextatus, op. cit. II. p. 95.