Resigning the secretaryship in 1848, he was elected to the national House of Representatives as an anti-slavery Whig to succeed John Quincy Adams, and was re-elected in 1849, and, as an independent candidate, in 1850, serving until March 1853.
Resigning from the army in 1836, he became a civil engineer and constructor of railways, and was engaged under the war department in survey work.
He therefore issued a manifesto resigning the throne, and left Bulgaria on the 8th of September 1886.
A merchant named Cony refused to pay customs not imposed by parliament, his counsel declaring their levy by ordinance to be contrary to Magna Carta, and Chief Justice Rolle resigning in order to avoid giving judgment.
In 1724 he became rector of Houghton-leSpring, Durham, resigning in 1727 on his appointment to the rectory of Ryton, Durham, and to a canonry of Durham.