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.
John Bicknell marry her, she had remained a ward of Richard Lovell Edgeworth, and lived in the West Midlands. After Bicknell's death she became housekeeper and manager for Charles Burney the younger, a schoolfellow of her late husband at Charterhouse. There were two sons of the marriage, John Laurens Bicknell and Henry Edgeworth Bicknell, young boys on their father's death. Sabrina as widow had financial support from Day and Edgeworth, and George Hardinge and Anna Seward organised collections for her. John Laurens Bicknell, educated at Burney's school, became a solicitor and Fellow of the Royal Society. Charles Bicknell, John's younger brother and