An inscription, which is now built into the wall on the north of the pillar, commemorates the remission of all debts to the emperor’s private purse (fiscus) by Hadrian, a fact which we find also mentioned in Dion Cassius and Spartianus. The latter writer adds that it was in the Forum of Trajan that Hadrian publicly burnt the list of his debtors, and the inscription was no doubt intended to mark the spot of this act of liberality or bribery. [Sidenote: Ruins of the Forum Julium.] The ruins of two portions only of the Forum Julium, which adjoined that of Trajan, have been discovered in modern times. The first is a considerable part of the outer wall of the Forum, standing in the court of the house No. 18 in the Via del Ghetarello, a small street which opens out of the Via di Marforio, near the Carcer and the Church of SS. Martina e Luca. This ruined wall consists of three arches composed of large blocks of peperino and travertine skilfully cut and joined without mortar and under-built by another arch, as if in order to enable the wall to bear a great weight. The length of the fragment of wall is about 50 feet and the highest point about 30 feet. The other relic of Cæsar’s Forum is now no longer visible. We obtain our information about it from Palladio, the architect, about the middle of the sixteenth century, who relates that while he was at Rome the ground-plan of a temple was uncovered in digging the foundations of a house between the Salita di Marforio and the temple of Mars Ultor, a description which points plainly to the block of houses behind SS. Martina e Luca. There was a peculiarity in the inter-columniations of this temple, which Palladio particularly remarked. The distance between the columns, he says, was the eleventh part of the diameter of a column less than a diameter and a half. [Sidenote: Forum of Augustus. Temple of Mars Ultor.] The almost universal opinion of Roman topographers now is that the three Corinthian columns on the left-hand side of the Via Bonella and the massive arch which leads from it into the Via di Tor di Conti are the remains of the Temple of Mars Ultor, which Augustus built in his Forum, and of the north-eastern portion of the enclosing wall.