This Latin Inscription was found on the floor of the Sacellum of the Augustales. It mentions that a Aulus Lucius Proculus and his son gave a dinner to the Augustales and to the city council at the dedication of this building.
Steven Tuck's translation of the six line inscription follows
Sacred to Augustus
Aulus Lucius MEN = voting tribe
Proculus and his son Julianus
P . . . S = Pecunia Sua = "with their own money"
[Lower two lines:] they gave a dinner to the Augustales and to the city council at the dedication of this building [= large public dinner]
Tuck notes that the name Aulus Lucius Proculus indicates that he was a freed slave who became very wealthy and had become a priest in the organization of the Augustales.
Tuck, Steven L. "Worshipping the Emperors at Herculaneum," Lecture 21 in Pompeii: Daily Life in an Ancient Roman City. Produced by the Great Courses/The Teaching Company, Course No. 3742, 2010.