Report on a programme of building recording and petrological analysis, conducted to inform proposed works at St Peter and St Paul's Church, Bourne. The presence of a former blocked passageway in the north wall of the north tower was confirmed. The passageway appears to have been post-medieval in date, but was blocked by the time of the 1868 rebuilding work. Analysis of the stonework indicated an episode of repair before the passageway was blocked.