At the general election of 1820 Sibthorp stood again for Lincoln, where he had sat, like his father before him, since 1814, on the strength of his wealth, residence at Canwick Hall on the city’s southern edge and connection with his uncle Richard Ellison, a local banker and former Member. Despite being ‘too much indisposed to appear in the open air’ (his clergyman brother Humphrey stood in for him), he topped the poll after a contest forced by a third man.
He had never been able to bring himself to consider the proceedings against Her Majesty as unjust, illegal and inexpedient; and as to parliamentary reform, he ever should oppose every system which, under the pretence of reform, threatened to endanger the best principles of our constitution.
Ten days later he was ‘severely and dangerously hurt’, suffering ‘paralysis in the lower part of the back’, when a wheel flew off his carriage in Lincoln Minster Yard; sabotage was suspected but never proved.
in his more immediate neighbourhood he left a void which will not easily be supplied ... His manners were those of a perfect gentleman, polite, courteous, and unassuming. There was an inexpressible suavity in his demeanour that endeared him to all ... His powers of conversation threw instruction and delight all around him ... His intellectual attainments were of a very superior quality.
Ibid. 15 Feb., 15 Mar. 1822; Gent. Mag. (1822), i. 280-1.
By his will, dated 6 Nov. 1821, he left a life annuity of £300 and a legacy of £1,000 to his mother and a life annuity of £100 to Margaret Browne, ‘spinster, now residing at Canwick’. To Humphrey he devised a legacy of £8,000, plus £4,00 in shares and bonds, fee farm rents at Bristol worth £60 a year and a freehold house in Broadway, Blackfriars, London. He gave his brother Richard £8,000 and provided £3,000 to be invested for the benefit of the children of his sister Mary Hawkins. His real estate in Lincolnshire and Oxfordshire and the residue of personal estate sworn under £45,000 passed to his next brother Charles, who replaced him in the Lincoln seat.
