Remembered as being ‘from his school days until the close of a long and honourable life, a consistent and earnest Liberal’, Henderson was born at Durham, the eldest son of Gilbert Henderson, who had founded the family carpet manufacturing business in 1814.
As chairman of the Durham Liberal Association, there was little surprise when Henderson came forward at the 1864 by-election, following the death of the sitting Liberal member.
Described by one of his colleagues as ‘a safe politician … Liberal to the backbone’, Henderson voted with Palmerston’s second administration on most major issues, including against Disraeli’s motion of censure of government policy in the Danish war, 8 July 1864. As an avowed ‘advocate of a large extension of the franchise’, he divided in minorities for the county franchise bill, 13 Apr. 1864, for the borough franchise bill, 11 May 1864, and the ballot, 21 June 1864.
A frequent attender in the Commons, Henderson was described by a contemporary as ‘a man of business, who speaks like a ledger. His speeches are a plain unvarnished account of the facts, rendered luminous by a shrewd and practical common sense’.
Returned at the top of the poll at the 1868 general election, Henderson continued to attend actively, and speak on industrial matters affecting the north-east of England. His return at the 1874 general election, however, was declared void on petition after he was found guilty, along with the other sitting Liberal MP, of bribery by his agent.
