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Michael Johnston


June 2021
Page 8

Chronicles the investigation into a horizontal sundial inherited by the author, inscribed as being found in the River Liffey in 1866 and signed "H:Sutton 1654". Analysis confirmed the design latitude matches Dublin (53.35° N), authenticating it as a work by Henry Sutton, a leading 17th-century instrument maker. Explores its provenance and possible link to the Down Survey of Ireland.
Dials: Horizontal, Historical Dials