Marrat was of the opinion that the building was not particularly old, being built of brick and roofed with flat tiles, and that the Saxon window arches were the exception and perhaps indicated an earlier use for the building. He noted that the oldest register was from 1757. However, he subsequently amended his writings on the basis of new information which indicated a construction date around 1600 using materials from a chapel at Coningsby. Lewin also noted that he had seen registers, or perhaps copies of them, for as far back as 1682.