The fabric of the nave is of the Decorated style, though modern in date, with Perpendicular clerestory, having five three-light windows, on the north and south sides. The arcades are of four bays, with chamfered equilateral arches, springing from shafted piers; the capitals of the two central ones being ornamented with foliage of a decorated character; the others being plain. Each aisle has three three-light windows, of decorated style, in the side wall, and a fourth at the west end; these are modern, the north aisle having been
re-built in 1820 and the south aisle in 1821. There are north and south porches.
The chancel arch is modern, the carving of its caps being very delicate. On the north side the outline of the doorway, formerly leading to the rood loft, is still visible, and below, on the west side of the chancel wall, is a well-carved statue bracket of floriated character, which was transferred from the chancel, and on the south side a still older one, much plainer.
The east window of the chancel is said to be an enlarged copy of the east window of the neighbouring Haltham Church. It has five lights, with flamboyant tracery above, and is filled with rich coloured glass, by Heaton, Butler & Bayne; the subjects being, on the north side, above “The Annunciation,” below “The Nativity;” 2nd light, above “The Adoration,” below “The Flight into Egypt;” central light, above “The Crucifixion,” below “The Entombment;” next light, on south, above “Women at the Sepulchre;” below “Feed my Lambs;” southernmost light, above “The Ascension,” below “Pentecost.” In the upper tracery are “Censing Angels” and “Instruments of the Passion.” This window cost about £280 and is dedicated to the memory of the late Vicar, Prebendary W. H. Milner, who was largely instrumental in the restoration of the church, in 1861, and died Oct. 3, 1868.
In that restoration the architect was the late Mr. Ewan Christian, and the contractors for the work Messrs. Lea & Ashton of Retford. The cost of the restoration of the chancel was defrayed by J. Banks Stanhope, Esq., as Lord of the Manor and Lay Rector, the rest being done by subscriptions amounting to about £4,000.
The present organ was originally designed by Mr. John Tunstall, and built by Messrs. Gray & Davidson, of London, at a cost of about £400. As re-constructed by Mr. Nicholson, of Lincoln, it contains 3 manuals, a fine pedal organ with 45 stops, and more than 2,500 pipes. It cost more than £2,000, £1,350 of which was contributed by the late Henry James Fielding, Esq., of Handel House, Horncastle. At a later date a trumpet was added, costing £120, the result being probably as fine an instrument as any in the county. For many years the organist was Mr. William Wakelin, whose musical talent was universally acknowledged; on his unfortunate sudden death, on March 1st, 1908, he was succeeded by Mr. Hughes, recently Assistant Organist of Ely Cathedral.
Beneath the east window is a handsome carved Reredos of Caen stone, somewhat heavy in style, having five panels, two on each side containing figures of the four evangelists, the central subject being “The Agony in the Garden.” In this the figure of the Saviour is exquisitely designed; below are the three sleeping disciples, while above are two ministering angels, one holding a crown of thorns, the other the “cup of bitterness.” The panels have richly crocketed canopies, the central one being surmounted by a floriated cross. They are filled with diaper work, and the supporting pilasters are of various-coloured Irish marbles. The whole was designed by C. E. Giles, Esq., cousin of the late Vicar, Prebendary Robert Giles.
In the jamb, south of the Communion Table, is a Piscina; in the north wall a square aumbrey and a curious iron-barred opening, which was probably a Hagioscope for the Chantry behind. The present Vestry in the north-east corner is modern, built on the site where there was formerly a coalhouse, and, at a later date, a shed for the town fire-engine.
The Chancel has an arcade of three bays on the south side, filled with good 14th century carved oak screen work, separating it from the south-side chapel, said to have been anciently called “The Corpus Christi Chapel,” and has two bays on the north, the easternmost being occupied by the organ, separating it from St. Catherine’s Chantry; [36] the other having similar screen