[2] Christopher followed his grandfather into the legal profession, receiving his education at the Middle Temple from 1617, and being called to its bar in 1625.
This was in spite of having gained a reputation as belonging to a group at the Temple notorious for being ‘exceeding riotous and dissolute swaggerers and professed duellists and champions’.
[2] In 1636 Lewknor was appointed to a commission for better preservation of timber in view of the growth of the Sussex iron trade.
[2] In August 1642 Lewknor supported Chichester mayor Robert Exton when he issued the Royal Commission of Array, calling upon all able-bodied men to take arms for the king; in response to the city's "Valiant Resolution to stand for the privileges of Parliament, the Protestant religion, the laws of the land, and the liberty of the people".
[6] Lewknor was styled "the man appointed by his Majesty to take in money and plate on his behalfe" and on 28 August 1642, he took part in a parley between the besiegers of Portsmouth and the beleaguered garrison.
[2] He appears to have been present at the siege of Salcombe Castle in early 1646, when a Parliamentarian recorded that ‘Kit Lukener the great trencher man being therein, is afraid he shall be starved’.