Mavis Enderby is a hamlet in the Lincolnshire Wolds, in the district of East Lindsey, approximately 4½ miles E of Horncastle. The church is off the road through the village on the N side and is built of squared greenstrone rubble with limestone ashlar dressings. It has a nave with a S aisle and S porch, a W tower and a chancel.Of these the tower is 15thc but largely rebuilt in 1894 by C. Hodgson Fowler. The nave has windows of the 14thc and 15thc, but was also restored by Fowler in 1875, and the chancel was rebuilt in 1870. Romanesque sculpture is found on the shaft of a pillar piscina in the S porch, which supports a later medieval bowl; there is also a reset corbel head inside the church, of uncertain date.

Land in Mavis Enderby and Raithby was held by Alnoth in 1066, and assessed at 4½ bovates. In 1086 it was held by the Bishop of Durham. Ivo Taillebois held 3 carucates of land here in 1086 as sokeland of his manor of Bolingbroke, and Eudo FitzSpirewic held half a carucate in demesne that had been held by Godwine in 1066.

The object is variously described in the literature as a pillar piscina or a holy water stoup. It seems likely that it was originally the former, moved into the porch and supplied with a larger late-medieval bowl to fulfil a new function as the latter.

The fleurons on the pillar piscina bowl are indentical in style to those on the continuous moulding of the Perpendicular S door beside the piscina, which points to a 14thc. date. The SW and SE angle motifs of the capital are similar in form to that found on the R nook shaft capital in the W tower doorway at Baumber. These angle motifs were probably originally human heads. It is unclear whether the folded pleats on either side of the SW angle motif belong to it (stylized hair?) or to the scallops on the S and W faces.

The reset corbel head probably dates from the 12th or 13th century.