Devoted to Glasgow School
ONE might not have thought that a Glaswegian enamelled devotional triptych was the easiest of items to estimate, but Lyon & Turnbull (17.5/10% buyer's premium) specialist John Mackie had a number of reference points when cataloguing the piece shown right for the decorative arts sale in Edinburgh on April 21.
Firstly, it was the work of De Courcy Lewthwaite Dewar (1878-1959) and she had signed and dated it D…