Towers like those of St. Mary-le-Wigford and St. Peter-at-Gowts, or of Bracebridge, may be regarded, on the strength of their different quoining and their lack of any bond with the fabric behind, as final additions to churches which, in point of date, we have provisionally classified with Stow. Not infrequently, the tower and church were built together without afterthought, as at Winterton, where the ends of the nave walls still remain in bond with the tower, enclosed within the spacious church of the twelfth, thirteenth, and fourteenth centuries. If we attempt to classify these towers chronologically, however, we may try several standards. The relative height and width of the tower arch affords no criterion; this seems to be varied at the fancy of local masons. Again, rude attempts at moulding, like that at Nettleton, tell us nothing; the moulded tower arch at Corringham is so out of keeping with the tower itself that it can hardly be part of the original design; the wide arch at Harmston is clearly a reconstruction achieved comparatively late in the twelfth century. But the absence of through-stone masonry, the approach to the system of rubble core and dressed facing, indicate a growing assimilation to “Norman” methods. The tower at Waith has a facing of rough ashlar, which is found in no other Lincolnshire tower of the type. Another tell-tale sign is the appearance of herring-bone work, which Norman builders used freely in the walling of their earlier castles, and builders of the pre-Conquest period certainly used little, if at all. The “herring-bone” masonry of the tower at Marton is identical in style with that in the curtain-wall of Tamworth Castle.