5. Sarcophagus found on the Via Appia, representing a fight between Roman and Gallic cavalry, when, in 223 B.C., Marcus Marcellus killed Virdomarus, the chief of the Insubrian Gauls, and so carried off the third Spolia Opima (Livy, "Ep." xx.; Florus, ii. 4; Eutropius, iii. 6; Plutarch, in "Marcellus"). The central figure is strikingly like the figure of the wounded Gaul miscalled the dying gladiator. 12. Inscription to Vettius Agorius Prætextatus, prefect 367, and his wife, Paolina. 14. Bust of Crispina, wife of Commodus. 13. Inscription from villa of Herodes Atticus, Via Appia, used afterwards as a milestone under Maxentius. 2. Monument to Bathyllus, an actor of the time of Augustus, afterwards custodian of the Temple of the Deified Augustus. THIRD ROOM.--1. Sarcophagus found in a mound on the road to Frascati, called Monte del Grano. Inside the sarcophagus was found the Portland vase now in the British Museum, which contained the ashes. The sarcophagus is surmounted by the figures of a man and woman in repose. The reliefs illustrate the life of Achilles. 2. Relief of Priests of Cybele. 6. Cosimati mosaic, with reliefs from life of Achilles. 12, 13. Portraits in relief of Nero and Poppæa. 15. Pluto and Cerberus, found in the Baths of Titus, 1812. STAIRCASE. On the walls are encased the fragments of the marble plan of Rome found in 1534-50, 1867, behind the Church of SS. Cosmo and Damiano. They had originally served for the panelling of the wall that formed part of the Temple of Rome built by Hadrian. The plan was made in the third century, in the time of the Emperor Septimius Severus (193-211). It is called the "Pianta Capitolina," and is of great use to archæologists in studying the ground plan of the different buildings marked upon it, though not as showing their relative positions. After many years of study we have succeeded in putting this puzzle together, and have published the marble plan, systematically arranged in ten sheets, price six shillings, with descriptive letterpress. _The doors at the top of the stairs lead us into the_ HALL OF THE DYING GAUL. "He leans upon his hand; his manly brow Consents to death, but conquers agony; And his drooped head sinks gradually low; And through his side the last drops, ebbing slow From the red gash, fall heavily one by one."