Church Fabric Survey database
2013
Sources for Helston: St Michael
Antiquarian Horological Society
AHS Turret Clock database
2015
Philip Halling (of geograph.org.uk)
Interior image of 639043 St Michael, Helston
2019, April 23
Philip Halling (of geograph.org.uk)
Exterior image of 639043 St Michael, Helston
2019, April 23
Church Buildings Council
Church Bells
2019
Church of England
A Church Near You
2021
ICBS
Incorporated Church Building Society Archive
1817-1989