Portrait of Mary Denton (1558-1574), wife of Alexander Denton (1542-1576) of Hillesden in Buckinghamshire and a daughter and co-heiress of Sir Roger Martyn, Lord Mayor of London in 1568 (a member of the Martyn family of Long Melford in Suffolk), by his second wife Elizabeth Castelyn, a daughter of William Castelyn/Castelin of London.

Three-quarter-length young girl to half-left, her chestnut hair in an elaborate jewelled hair band, wearig a lace ruff collar, a black damask surcoat with gold embroidery over a dull red velvet bodice and skirt, with a white underskirt; she holds in her right hand a pendant of diamonds and rubies in an elaborate enamel setting; inscribed, upper right: (ANNO) AETATIS SUAE 15 / ANNO DNI 1573 ("In the year of her age 15; in the year of Our Lord 1573").

Sir Roger Martyn married twice:

• Firstly to Letitia/Letice Pakington (d. 23 December 1553), a daughter of Humfrey Pakington of London, younger brother of Sir John Pakington of Hampton Lovett in Worcestershire;
• Secondly to Elizabeth Castelyn, a daughter of William Castelyn/Castelin of London.

Coat of arms, a triple impalement:

• Centre: Gules, on a fess engrailed argent between three swan's heads and necks erased proper ducally gorged sable three mascles of last (Martyn, of the City of London); (Burke, Sir Bernard, The General Armory, London, 1884, p.665, which excludes the mascles)
• Dexter, normally where arms of a first wife would appear (Per chevron sable and argent, in chief three mullets or in base as many garbs gules (Pakington)) - yet these are the arms of Denton, his son-in-law, an unorthodox marshalling. Quarterly of 6:
  • 1: Argent, two bars gules in chief three cinquefoils sable (Denton) (Burke, Sir Bernard, The General Armory, London, 1884, p.280)
  • 2: Argent, a fess dancetée between three ..... gules
  • 3: Or, a lion rampant sable
  • 4: Gules, a fess dancetée or
  • 5: Ermine, a fess gules or Argent, a fess gules between ten billets (?) sable
  • 6: Argent, three ..... between two pales sable

• Sinister, for second wife: Quarterly of 4:
  • 1&4: Sable, on a chevron or between three castles argent therefrom issuing as many demi-lions of the second three anchors azure (Castelyn)
  • 2&3: Or, on a mount vert an eagle displayed sable (an heiress of Castelyn, of unknown family, per Heraldic Visitation of London, 1568, quoted in Burke, Sir Bernard, The General Armory, London, 1884, p.176, re:Castelyn)
    
    

See [1] See The Visitation of London in the year 1568. Taken by Robert Cooke, Clarenceux king of arms, and since augmented both with descents and arms, p.2, pedigree of Martyn; p.39, arms of Castelyn[2]