At the end of his first spell as a Member in 1812 Bonham, the grandson of a sea captain in the slave trade, owned nine ships engaged in East Indian commerce, but it is not clear whether he remained active in that line in this period. On the death of his father, aged 92, 25 Jan. 1821, he inherited property in various Essex parishes under entail from his uncle and namesake, and his last child was born at Kelvedon Hall later that year.
his principles were those of perfect independence, unconnected with any party. He should on all occasions give ... a free, honest, unbiased vote ... At the same time ... he should not shrink from supporting the measures of government at all times when he considered those measures calculated for the public good; he would support ministers on pure Whig principles ... Real Whiggism did not consist of an uniform opposition to every existing ministry, but ... on some occasions it became imperative for the real Whigs to give their decided support to the members of the administration.
Add. 57367 f. 39; Kentish Chron. 13 Feb. 1824.
He presented Sandwich petitions against the coal duties, 26 Feb., for the abolition of slavery, 16 Mar., and against the beer bill, 11 May 1824, but is not known to have spoken in debate.
