of the north aisle and endowed a chantry in what is now the Lady Chapel, which used to be called the Hundon choir. On the floor of this chapel, and obviously moved from some other position, is the effigy of a lady in costume of the same date as Sir William, presumably his wife. Under a cusped recess in the chapel is the extremely fine figure of Sir John de Hundon, in which almost every detail of the armour is perfect (Plate II). Sir John was Sheriff of Lincolnshire in 1343. His monument used to be boxed in by boarding, which perhaps saved it from suffering greater mutilation, --as it is the hands are broken, the dagger sheath has gone and the angels supporting the cushion on which his head rests are much damaged. Little is known of the Hundon family, who seem to have become merged through the female line in the Truesdales at an early date.
Next, in chronological order, comes the brass of John Ousteby and Joan his wife, A.D. 1461. This is in the floor of the chancel and consists of an incomplete inscription and the symbols of the Evangelists, SS. Mark and Luke, those of SS. Matthew and John having disappeared.  After her husband's death the widow took religious vows and was professed by the Bishop of Limerick, acting on behalf of Bishop John Chedworth, of Lincoln.
In the present sacristy, formerly known as the Maddison Choir, is a good coloured mural effigy in alabaster of Sir Edward Maddison, of Fonaby. On the opposite wall is a damaged tablet commemorating Katherine, daughter of Ralph Bosville of Bradbourne, in Kent, who married Edward Maddison of Fonaby, grandson of old Sir Edward. She died in 1619.
On the wall of the north aisle is a brass, fixed there for safety, but formerly on the floor of the chancel, which perpetuates the memory of Godfrey Carrington, sometime vicar of Caistor, who died in 1670, and was buried before the High Altar, and also Ann, his wife, who died in the same year as her husband.
Other mural tablets in the Church are fairly modern. The small brass plate near the organ refers not to the present instrument, but to its predecessor which was removed many years ago.