the library of Apollo in the imperial palace on the Palatine.  A most pathetic lamentation in verse is made by one Julia Prima over the ashes of her husband; and an inscription, along with a portrait of the animal, records that beneath are the remains of a favourite dog that was the pet of the whole household—­a little touch of nature that links the ages and the zones, and makes the whole world kin.  The whole of this region, called Monte d’Oro, for what reason I know not, seems to have been a vast necropolis, in which not only Columbaria for their slaves and freedmen were built by the great patrician families, but also family vaults for the wealthier middle classes were constructed and sold by speculators, just as in our modern town cemeteries.

Very near the modern gate of the city the road passes under the so-called Arch of Drusus.  It consists of a single arch, whose keystone projects on each side about two feet and a half beyond the plane of the frontage; and is built of huge solid blocks of travertine, with cornices of white marble, and two composite columns of African marble on each side, much soiled and defaced, which are so inferior in style to the rest of the architecture that they are manifestly later additions.  The whole monument is much worn and injured; but it is made exceedingly picturesque by a crown of verdure upon the thick mass of soil accumulated there by small increments blown up from the highway in the course of so many centuries.  It was long supposed that Caracalla had barbarously taken advantage of the arch to carry across the highway at this point the aqueduct which supplied his baths with water.  But the more recent authorities maintain that the arch itself, so far from being the monument of Drusus, was only one of the arches built by Caracalla in a more ornamental way than the rest, as was commonly done when an aqueduct crossed a public road.  This theory does away at one fell stroke with the idea so long fondly cherished that St. Paul must have passed under this very arch on his way to Rome, and that his eye must have rested on these very stones upon which we gaze now.  It is hard to give up the belief that the stern old arch, severe in its sturdiness and simplicity as the character of the apostle himself, did actually cast its haunted shadow over him on the memorable day when, a prisoner in chains in charge of a Roman soldier, he passed over this part of the Appian Way, and it signalised a far grander triumph than that for which it was originally erected.  We should greatly prefer to retain the old idea that under that arch Christianity, as represented by St. Paul, passed to its conquest of the whole Roman world; and passed too in character, the religion of the cross, joy in sorrow, liberty in bonds, strength in weakness, proclaiming itself best from the midst of the sufferings which it overcame.