This Eastern plan of three apses was adopted about the same early period at Melbourne and Lindisfarn; and, as it was not long before the death of the great Archbishop Theodore that this arrangement came in, there is a great probability that he introduced it from his native country of Syria, where the churches were always constructed with three apses. The absence of any marks of juncture upon the exterior of the walls also inclines one to suspect that there was a passage from apse to apse behind the wall, as there always is in Eastern churches. The whole arrangement will be made abundantly clear from the above conjectural ground-plan of the ancient church, c. 740. There are indications that these three apses are not of precisely the same date, for the northernmost arch is the smallest of the three, and the apse is correspondingly smaller. It is therefore surmised that the southernmost apse belonged to the church of Didan, the father of St. Frideswide, and dedicated to the Holy and Undivided Trinity, "without any more title and addition," while the other apses were the additions of Frideswide herself, when the church was adapted to the purposes of a convent, with the additional dedication to St. Mary and All Saints. This may be the reason why the chapel in a line with the central apse, and therefore on the site of the ancient nave, is still the Lady Chapel. Another important point rests upon the document which states that, when Ethelred II. enlarged and repaired the old building, the result was that the tomb of St. Frideswide, which before was on the south side of the church, thereupon stood in the middle. The tomb of St. Frideswide must therefore have been in the southernmost of these three apses (in a "chapel," as Wood says, on the south side of the convent church), and not, as some people have supposed, in the vault discovered under the tower during Scott's restoration. A significant corroboration of the old document is supplied by the fact that the Norman plinth, which was carried across the other two archways, breaks off at the arch which leads into the south apse. It would thus seem that access was, after the Norman restoration, still afforded into this chapel, and that St. Frideswide's relics remained there until the Translation of 1180, when they were moved "from an obscure to a more noted place in the church" on the completion of the Norman restoration.