Oliver St John was also a manger of the trial. This portrait is after an original by Hollar.
In the 1840s, before the founding of the National Portrait Gallery, it would have been difficult for Woolnoth to gain access to original portraits of the characters in his painting since most were held in private collections. It is likely that he used published collections of prints and engravings as these would have been more accessible to him than the original portraits. There are certainly similarities between some of his figures and their known portraits. The two artists whose work most evidently inspired Woolnoth were engraver Wenceslaus Hollar (1607-1677) and Court portraitist Anthony Van Dyck (1599–1641).