John Bicknell solicitor to the Admiralty and the Prince Regent, became father-in-law to John Constable. His eldest daughter Maria Elizabeth Bicknell married Constable in 1816. John Bicknell John Bicknell, the elder (baptised 1746 – 1787) was an English barrister and writer. He was co-author with Thomas Day of the abolitionist poem "The Dying Negro" from 1773. Bicknell has also been credited with "Musical Travels through England", a pseudonymous satire on Charles Burney. The second son of Robert Bicknell of the Inner Temple, he was admitted to the Middle Temple in 1761. He was called to the bar at Lincoln's Inn in 1769.
Elhanan Bicknell of Hertford bought about one-third for his own gallery. In 1829 Bicknell married Lucinda Browne, a sister of Hablot Knight Browne (aka Phiz, the illustrator of Dickens). He left a large family by his various marriages, and some his sons (one of whom married the only child of David Roberts, R.A.), in succeeding to his fortune, made names for themselves in the arts, archaeology, botany, travel, and reform. Elhanan Bicknell Elhanan Bicknell (21 December 1788–27 November 1861) was a successful London businessman and shipowner, He used his wealth as a patron of the arts, becoming one of the leading collectors