North aisle has 2-light windows to north with Y-tracery, double-chamfered north door with hood mould and carved head stops within porch of 1864
South door with double sunk chamfers within porch with double hollow-chamfered doorway with hood mould, one-light windows to east and west with ogee head, diagonal buttresses, tile roof and stone-coped gable
Interior: chancel has fine C14 triple sedilia and double piscina, seats with pointed trefoil heads, miniature rib vaults within with foliage bosses, projecting divisions with crocketted pinnacles, crocketted hood moulds with ogee-arch frieze above the underside carved with foliage and fantastic beasts and brattishing on top
Fine C19 Perpendicular-style painted stone pulpit
Stained glass: south-west chancel window 1878 by Clayton and Bell, tower window by Hardman 1893, and C17 painted armorial panels in heads of chancel chapel windows
Mali monument to Benjamin Bathurst d.1704 and his wife d.1727 topped by urn against obelisk panel (behind organ). Wall monuments to Joseph Spinall d.1726 by Hunt, and Robert Sheddon of Paulersbury Park d.1826 by Theakston, and other C19 wall monuments. (Buildings of England: Northamptonshire, p.371