The cemetery has not been thoroughly explored. It is, however, of some importance. Several galleries have been partially examined--but with some risk. The _Via Salaria Vetus_, by the side of which this Catacomb, is situated, branches off from the Via Pinciana on the north of the city. _Cemetery of S. Hermes and S. Basilissa_ is on the same road, a little farther from the city. The “Acts of S. Hermes” are not accepted as belonging to the very early date (A.D. 119--when Hadrian was Emperor) of the martyrdom, the particular event they profess to relate. These Acts relate that Hermes was a Prefect of Rome. No such name occurs in the lists of Prefects. It has been suggested, however, that he was an official of the Prefect. The remains of a very considerable basilica have been discovered in this Catacomb; a yet older building apparently existed in the same position. The galleries of graves that have been partially explored are in a very ruinous and dangerous condition. It is recorded that the body of S. Hermes was translated by Pope Gregory IV in the ninth century. There are parts of this crumbling cemetery evidently of great antiquity. Other martyrs, once well known, rest in this Catacomb; of these, S. Basilissa, S. Protus and S. Hyacinthus are perhaps the best known. SS. Protus and Hyacinthus apparently suffered in the persecution of Valerian, A.D. 257-8. The tomb of S. Basilissa has not been identified. The remains of S. Hyacinthus were found as late as 1841 in a _closed_ loculus and wrapped in a cloth which still emitted a sweet perfume. The bones had evidently been burned. It has been suggested that probably the martyr had suffered by fire; this was an unusual form of martyrdom. The name of the saint and date of the deposition and the word _Martyr_ were on the loculus. The inscription and the hallowed remains are now in the Church of the Propaganda. Probably further investigation will be made in this interesting but ruined Catacomb. Researches here, however, are difficult and dangerous. Much of the work of Damasus in the later part of the fourth century has been recognized in this place. This cemetery was apparently held in high estimation by the earlier pilgrims. The Itineraries speak of another cemetery on the Via Salaria Vetus under the name of “ad Clivum Cucumeris.” but it has not as yet been identified. _Cemetery of S. Valentinus._--The old Via Flaminia leaves the city at its north-east corner, and is a direct continuation of the Corso. It is the great road communicating with the north of Italy, as the Via Appia does with South Italy. It passes through the Porta del Popolo, formerly the Gate of S. Valentinus; in old days it was termed the Flaminian Gate. On this Via Flaminia not very far from the city there is the Catacomb of S. Valentinus--the only cemetery on this road.