September 2012 page 29
Geoffrey Lane

The Tyttenhanger Sundial

This article details the rediscovery of a mid-17th century glass sundial at Tyttenhanger mansion, Hertfordshire, designed for Sir Henry Blount's arms and a 13-14 degree declination. It bears the motto "Lumen Umbra Dei" and is compared to similar dials by John Oliver, suggesting Oliver as its likely maker despite earlier attributions to Henry Gyles.
Dials: Vertical, Historical Dials, Mottoes

February 2006 page 40
Geoffrey Lane

Glass Sundial Makers of 17th Century London

This article explores the careers and working methods of prominent 17th-century London glass sundial makers, including Baptist Sutton, John Oliver, Richard Dutton, and William Price. It identifies common features of London dials, discusses challenges in attributing their work, and examines the role of these figures as mathematical practitioners.
Dials: Unusual, Historical Dials