Murdoch Stewart, Duke of Albany, the Governor of Scotland, signed a Commission dated 19 August 1423 for his named Ambassadors, one of whom was "Sir Robert de Lawedre of Edrington, Knight", to treat for the liberation of King James I of Scotland. These Ambassadors are recorded present in the Chapter House at York on 10 September with the King's ransom of £40,000 sterling and to sign the treaty of liberation. Lauder's signet is attached to that treaty.Bain, Joseph, FSA (Scot), editor, Calendar of Documents relating to Scotland vol.iv, 1357–1509, Edinburgh, 1888, numbers 932-3
