The following text is from the original listed building designation:
HORTON KIRBY HORTON ROAD 1. 5280 (west side) The Parish Church of St Mary TQ 56 NE 3/189 1.6.67 II* Cruciform. Early English Church Circa 1190 with C14 and C19 alterations. Built of flint with stone dressings. Some stock brick repairs. Tiled roof. In 1816-17 George Smith rebuilt the tower in brick and lopped off the eastern half of the chancel. In 1862-3 Ewan Christian restored the stonework. The south porch is mediaeval. The C14 nave is of 4 bays and has a crown post roof. The aisles were demolished in tile C14. The most impressive feature are the Early English crossing arches with stop-chamfers and deep moulded abaci. Chancel has lancet capitals of Canterbury type with trumpet shaped bowl, square abacus and acanthus foliage. Chancel contains 5 Bathurst cartouches the earliest C1688. Brasses, particularly Alice Drayton (died 1468).
Listing NGR: TQ5625168352 (11)

Description from record TQ 56 NE 18 :
(TQ 56206855) St. Mary's Church (NAT) (1) The Church of St. Mary, Horton Kirby, is 13th c. and later. (See plan) (2) In normal use. (3) 1. 5280 HORTON KIRBY HORTON ROAD (west side) The Parish Church of St. Mary TQ 56 NE 3/189 1.6.67 II* 2. Cruciform. Early English Church Circa 1190 with C14 and C19 alterations. Built of flint with stone dressings. Some stock brick repairs. Tiled roof. In 1816-17 George Smith rebuilt the tower in brick and lopped off the eastern half of the chancel. In 1862-3 Ewan Christian restored the stonework. The south porch is mediaeval. The C14 nave is of 4 bays and has a crown post roof. The aisles were demolished in the C14. The most impressive feature are the Early English crossing arches with stop-chamfers and deep moulded abaci. Chancel has lancet capitals of Canterbury type with trumpet shaped bowl, square abacus and acanthus foliage. Chancel contains 5 Bathurst cartouches the earliest C1688. Brasses, particularly Alice Drayton (died 1468). (4-5) Additional bibliography. (6) The Brass to Alice Drayton in St. Mary's Church, Horton Kirby. (7)

Watching brief on trenching for new toilet in the south transept. This work revealed a floor surface consisting of unglazed red earthenware tiles and a probable limestone ledger stone, of an earlier phase of the church, probably early post-medieval.(9)

<1> OS 6" 1961. (OS Card Reference). SKE48370.

<2> Arch. Cant. 61, 1948. 53-6 (plan) (F. C. Elliston Erwood) (OS Card Reference). SKE37025.

<3> F1 ASP 28-AUG-64 (OS Card Reference). SKE42331.

<4> DOE(HHR)Dist of Sevenoaks Kent Oct 1972 69 (OS Card Reference). SKE41342.

<5> Bldgs of Eng W Kent and the Weald 1980 335-336 (J Newman) (OS Card Reference). SKE37992.

<6> Trans Dart Dist Ant Soc 1932 29-32 (Cresy) (OS Card Reference). SKE50634.

<7> Arch Cant 96 1980 386-90 illus (PJ Tester) (OS Card Reference). SKE36260.

<8> Field report for monument TQ 56 NE 18 - August, 1964 (Bibliographic reference). SKE2884.

<9> Archaeology South-East, 2001, Archaeological Watching Brief at Church of St.Mary, Horton-Kirby, Kent (Unpublished document). SKE7696.

<10> Diocese of Rochester (Tim Tatton-Brown), 1992, Horton Kirby, St Mary:Diocesan church survey (Unpublished document). SKE29634.

<11> English Heritage, List of Buildings of Special Architectural or Historic Interest (Map). SKE16160.