We may observe an apparent difference in the shapes of these three churches. Of _St. Martin's_ we shall speak at length hereafter, but we may note that, besides the different width of the nave and chancel, there is no sign of an apse at the west end, while indications of an eastern apse are more or less conjectural. In the plan of the original _Cathedral_, conjecturally drawn by Professor Willis from Edmer's description, and which he supposes was the old Christian church preserved by St. Augustine, the building was a plain parallelogram, with apses at both the east and west ends. The choir was extended into the nave, enclosed by a high breast-wall, and about the middle of the church (on the north and south) were two towers, the tower on the south side containing an altar, and also serving as a porch of entrance. This church was built, according to Edmer, "Romanorum opere," and in imitation of the Church of St. Peter, chief of the apostles, meaning the Vatican Basilica. In _St. Pancras_ there is a tower, or square porch, at the west end, and two transepts of the same size branching off from the centre of the nave, while the foundations of the chancel walls start farther in than those of the nave wall; and, at the distance of twelve or thirteen feet from the point of junction, can be detected the commencement of an apse. In this church we have discovered no doorways, except the one at the west end through the tower, and the possible indications of one leading into the southern transept, where we may yet see remains of an interesting altar (size, 4 ft. 4 by 2 ft. 2), which, if not the identical one that St. Augustine erected on the site occupied by the idol of Ethelbert, is at any rate a very ancient memorial of it. It is worthy of remark that these three churches are situated in almost a direct line from east to west, and were all outside the Roman walls, and apart from the Roman cemeteries. The orientation of all of them is nearly perfect. * * * * *