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Details about John Henry Rundle:
Occupation: Police Constable.
Age in 1911: 38 years old.
Place of birth: St. Just-in-Penwith, Cornwall.
Residence in 1911: Rundle lived with his family at the Police Station in St. Mawgan.
John Henry Rundle's family in 1911:
Wife: Elizabeth A. Rundle (age 34).
Children:
Winifred J. Rundle (age 11)
Mabel E. Rundle (age 9)
John R. Rundle (age 7)
Marjorie Rundle (age 4)
Lillian Rundle (age 1)
Perhaps there is more information about John Henry Rundle's address in other sources?
There is a newspaper notice mentioning "PC Sambles" in 1919 in Mawgan. Have you searched his address in the 1921 Census?