
ST MARY . PENZANCE . CORNWALL
GRADE II* ✣ Originally a chantry chapel of Madron parish; records from 1321. In due course rebuilt, and reconsecrated 1838. Destructive arson in 1985; 2 recent attempts. 8 bells of interest. Some traces of the past remain, eg memorial tablets*. 50.1165 / -5.533 / SW475300
VERTICAL DIAL

This slate dial with its bronze gnomon was originally made for a chapel near the church. The BSS records indicate that the dial declined 12º W in that position, but needed to be canted in its new position to correct for the different declination of the buttress of St Mary’s where it is now to be found.
The dial clearly predates the building of St Mary. Perhaps ± 1800 would cover it. For a chapel, the 5 minute intervals noted below suggest a quite sophisticated dial.
MOTTOES
There are two learned mottoes cut inside the arch at the top, with Father Time below them.
Solem quis dicere falsum audeat Who would dare to call the sun false (Virgil)
Tempus edax rerum Time the consumer of all things (Ovid)
CONSTRUCTION

Mrs Crowley, who sketched dials of Devon & Cornwall, noted a difference between stone top and bottom; and the horizontal line seems too high to be an indicator of the equinoxes and, in any case, there is no nodus on the gnomon. The engraving is good, there are decorative half-hour markers and the hours are divided down to five minute intervals.




In the sanctuary is a Baroque tablet to John Tremenheere, d. 1701, with Doric columns, broken segmental pediment and a winged skull at the base (HE). His tomb is in a family vault below the centre aisle. I am a direct descendent, but unlikely to join him.

GSS Category: Vertical Dial
All photos Keith Salvesen except header as cited