He was also involved in the construction of archways and sewers for the London Underground's first railway as part of the Metropolitan Board of Works.
During campaigning, Treeby bribed electors—who otherwise "taunted" him from having "risen for the people"—leading to a tie with his rival William Pinney, only settled when the local mayor added an additional vote to the Liberal candidate once polling had closed, blaming a "slow-running watch".
He also amended the Conservative Reform Act 1867 bill, requiring overseers of elections to publish lists of ratepayers in arrears and in danger of losing their rote to vote.
Yet, he also attempted to make public secret land deals between "resident country gentleman" and railway companies saw him rebuked by fellow Conservatives.
[2] Treeby later ended up at loggerheads with his former ally, Disraeli, when the 1868 Scottish Reform Bill saw an additional seat granted to Scotland at the expense of Lyme Regis, whose parliamentary representation was transferred to Dorset.