Not only the relations and friends were careful to preserve the memory of the martyrs, but, as we have already said, the congregation to which they had belonged. While the former erected chapels over the tombs of the martyrs, and preserved the information relating to them, the community on its part marked down in its registers their names and the days on which they suffered. In large communities the Bishops took steps for drawing up authoritative reports concerning the martyrs belonging to their flocks. According to the _Liber Pontificalis_, Clement I. is said to have divided Rome into seven regions, with a Christian notary appointed over each whose business it was carefully to investigate matters of this nature belonging to his region.[450] The size of the city of Rome rendered this necessary. Augustus had divided Rome for civil purposes into fourteen regions, but Clement, for the purpose he had in view, formed one region out of every two. Pope Fabian again adopted similar measures, and enjoined upon the seven sub-deacons the duty of seeing that the seven notaries made a complete collection of the acts of the martyrs. He thus doubled the number of persons employed in this matter, and placed the subdeacons over the notaries.[451] His predecessor Anteros (235-236) collected the _gesta martyrum_, and carefully preserved the Acts of the martyrs, as we learn from a somewhat obscure notice in the _Liber Pontificalis_.[452] This is again referred to in the same work, where it is stated that Pope Caius appointed the regions of the city to the deacons during the Diocletian persecution. St Cyprian adopted the same plan at Carthage during the persecutions under Decius and Valerian. He ordered the priests and deacons of Carthage not only to interest themselves in every way on behalf of the faith of those in prison, but also to take thought for the bodies of those who died in bonds, even when they died without having undergone torture, and also to keep a record of the name and date of death of each one, in order that his memory might be celebrated along with the memorials of the martyrs.[453] The order to take down the date could be easily obeyed everywhere, since in every city, Calendars engraved on marble tablets were set up for public use.[454] We have an authoritative document of this kind in the detailed account given by the communities of Lyons and Vienne, of the martyrdoms which took place there under Marcus Aurelius. Owing to its having been sent to Asia Minor, Eusebius was able to utilise it and incorporate the chief parts of it into his history of the Church.