Stone W with a dressed face. Soft light porous material with plant impressions, possibly calcareous tufa. Stone W, possibly from the Brown Ancaster Weather Bed, a stone that was worked in the Roman period. This stone alone exhibits distinctive tool marking and raises the suspicion that it may possibly have come from a pre-existing Roman building in the vicinity. Tufa is also known to have been used by the Romans. ... As for the location of the source, this may be linked with the discovery of an amphora sherd in the village, or to that of Roman building materials from the adjacent village of Laxton. (1)
See L4179 for amphora

<1> TPAT, Mar 2002, Recently Discovered Evidence of an Early Medieval Church at Kneesall, Nottinghamshire, pp 1, 2, 5 (Unpublished document). SNT2547.