Thomas Finlayson Henderson, Dictionary of National Biography… (1893)
“ LOCKHART, Sir GEORGE (1630?–1689) , of Carnwath, lord president of the court of session, born about 1630, was younger brother of Sir William Lockhart [q. v.] , and was second son of Sir James Lockhart of Lee [q. v.] , by his second wife, Martha, daughter of Sir George Douglas of Mordington, Berwickshire. He was admitted advocate 5 June 1656, and on 14 May 1658 was named advocate to the Protector during life, ‘or so long as he demeaned himself well therein.’ In 1658–9 he was sheriff of Lanark, and represented Lanarkshire in the English parliament of 1658–1659. ”
