(From a water-colour by Mrs M. Parry.)
Near these square-headed doorways there were discovered underground the remains of two walls, running at right angles to the chancel, and forming two sides of an adjunct or side chapel, the southern side of which has been destroyed in the process of digging graves. These walls are 4 ft. 9 in. apart, and are each of them 26 in. wide, built entirely of Roman bricks. The western wall runs eight inches beneath the eastern angle-wall of the nave. Between the walls there is still existing part of a flooring of opus signinum. There can be no doubt that this adjunct is of the same workmanship, and the same date, as the early brick wall of the chancel. The foundations of both are precisely similar, and are constructively bonded together—the walls rest upon a footing-course of one brick, which forms the top of a shallow foundation of flints and stones. The brick-footing is continued along the chancel wall under the sill of the square-headed doorway, and is irregular in its projection. A careful examination of the existing face of the chancel wall above the remains (which was made by Mr Livett), shows that the eastern wall of the adjunct above ground, now destroyed, was originally bonded into the chancel wall. Every alternate course shows a broken brick, and every intermediate course the clean edge of a brick. This bonding cannot be traced above a line on a level with the lower edge of the lintel of the square-headed doorway of the chancel.
What the purpose of this adjunct was, we cannot positively determine. It was suggested by the late Archbishop of Canterbury (who took the warmest interest in the church, and also keenly watched the progress of the excavations) that it was used as a place for baking the holy bread employed at the celebration of the Mass. It is more probable, however, notwithstanding its diminutive size, that it was a side-chapel with its altar.
At a distance of 4 ft. 2 in. eastwards of the square-headed doorway is a semi-circular one. It is 6 ft. high and 2 ft. 1 in. wide. The arch is mostly formed of converging blocks of Kentish rag, generally about one inch apart, though somewhat closer at the crown. The span at the springing is an inch or two wider than the span of the jambs. The imposts are formed of two Roman tiles, the upper one overhanging the lower, and the lower overhanging the jamb. The doorway is lined throughout with plaster. The jambs internally are of Roman bricks with occasional pieces of Kentish rag. Externally, they are almost entirely of Roman bricks, though under the west impost, 3 ft. 10 in. above the sill, there has been inserted a fragment of freestone about 2-½ inches high, brought from elsewhere. On this are parts of an inscription, which has been supposed by many people to date from the ninth or tenth century, though this date cannot be accepted as proved. The letters HONORE.. STÆ.. ET OMNĪV̄ SC̄ŌRV̄ are still decipherable, and the whole may perhaps be read as "To the honour of Saint (Mary?) and All Saints." This may have been the dedication-stone of a church, or not impossibly the dedication-stone of an altar, as an order was issued in the ninth century by a Saxon archbishop, that a stone should be placed at the corner of each altar, specifying the name of the saint or saints to whom it was dedicated. A parallel to this has been found in the discovery of a stone from the Saxon Church of Deerhurst, the fragmentary inscription
on which has been conjecturally read as "In honore Sanctæ Trinitatis hoc altare dedicatum est."