When the supper was over, the two boys, Clemens and Britannicus, disguised in the dress of humble slaves, went with Pudens down the Velabrum and along the bank of the Tiber, which they crossed by the island and the Fabrician and Cestian bridges. The region in which they found themselves was poor and squalid, and was largely inhabited by Jews. The Jewish and Gentile Christians at this early period worshipped in separate communities, but they met together on so great an occasion as the visit of an Apostle. But the laws about assemblies and foreign superstitions were a two-edged sword which might easily be wielded with fatal effect, and it was desirable for the Christians to hold their gatherings with as little publicity as possible, in order to escape the hatred both of Jews and Pagans. This meeting, therefore, was to be held at a remote spot in the hollow of one of the _arenariæ_, or sand-pits, and those who attended it were to use one or other of the Christian watchwords. They were to approach the place in scattered groups and from different directions, while scouts were stationed in the neighbourhood to give instant signal of approaching danger. Using these precautions, Britannicus and his attendants found themselves among the latest arrivals at the rendezvous. The winter darkness, deepened by the overhanging sides of the tufa quarry, rendered it necessary to have a few lights, but most of the assembled Christians extinguished or concealed their lamps. The dimness, the silence, the starry sky which overhung them, the strained expectation, the signs of intense devotion, made the scene overwhelming in its solemnity. At last a little group of the chief Christian presbyters, headed by Linus, was seen to approach. They passed under the shadow of the cliffs, and emerged before the table, on which one or two lamps were burning. Then the presbyters divided to the right and left hand, and the light fell full on the face and figure of one man who stepped a pace or two to the front.