37 MS dated 20 July 1659 (Huygens 1896, p. 264). Point-engraving on glass was a quintessentially Dutch craft. Many examples survive from the seventeenth century. While such glasses were certainly made commercially, glass-engraving was also practised by Holland's literati. Engraved glasses were often given as presents: Anna Maria van Schurman sent one with a poem to her friend John Smith, which said on the body of the glass, ‘Pallada cum Baccho si bene jungis, eris’, with ‘Hilaris cupis esse sodales?’ on the foot. Another of her glasses, made for Viglius van Zuichem, says ‘Viglius Zuichemius. Alben ik duister, mijn naam geeft luister’ (Though I am dark, my name gives lustre). These are typical of the genre. Huygens’ friends the Roemers sisters were particularly noted for their point-engraving. Engraved glasses’ beauty, fragility, and the labour which they represented, attracted the attention of a number of moralists.