Soon after he came of age, Lemon served his parliamentary apprenticeship, sitting for Penryn on the interest of a family friend, Lord de Dunstanville. He seems to have enjoyed freedom of action and, as the Marquess of Buckingham predicted, chose to act with opposition.
Whether his conduct proved unsatisfactory to his patron, who generally supported administration, or whether because the seat was to have been for one Parliament only, Lemon was not returned again in 1812. Robert Ward reported, 19 Apr. 1812, of a dinner at Ryder’s, ‘Some Cornish politics, in which it was said that none of the Lemons would be returned in the next Parliament’.
