This glass is decorated with an elegant, calligraphic engraving in Dutch which reads: ‘Faithful in everything’. The glass commemorates the marriage of Coenraed de Bucquoy and Maria Muissart, as engraved on the underside of the foot. Van Heemskerk also signed the glass, with the date 1681, and gave his age as sixty-eight and a half. Van Heemskerk was a prosperous cloth merchant in Leiden but became most well-known for his exquisite calligraphic inscriptions on bottles, plates and drinking glasses. He specialised in short sayings and poems and his graceful, fluent lines are recognised as unparalleled achievements in glass calligraphy.