The Rotuli Scotiae records a safe-conduct dated 4 November 1364, from King Edward III of England to 'Robertus, fils [son] of Alani de Lawedre'.
[9] Rymer's Foedera records that Robert de Lawdre was one of the sureties for the Earl of Douglas's bounds on the Middle March during a meeting at 'Haudenstank' between English and Scottish Commissioners on 26 October 1398, to discuss the return of prisoners and ransoms and "the due observance of the truce".
[11][12][13] A Notarial Instrument of Adam Hepburn Lord of Hailes dated 23 March 1417, refers to a Letters Patent of the late Margaret, Countess of Mar, signed and dated at Tantallon Castle on 10 December 1389, and read out in the church of the Friars Minors of Haddington in the presence of Sir Robert Maitland of Thirlestane, Sir Robert de Lowedir, Lord of the Bass, Sir Alexander de Cockburn Lord of Langtoun, all knights, and others.
[14] 'Roberto de Lawedre, knight', is a witness to a charter to Coldingham Priory confirming them in all of their ancient possessions, signed at Linlithgow on 2 January 1391–2.
Reid [1885] states that "Sir Robert Lauder de Bass received payments from the customs of North Berwick in 1413, 1414, 1415 and 1420", and in 1420 he was appointed Auditor of the Burgh & Baillie Accounts for the Exchequer.
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.
[25] A Warrant was issued at the request of James I dated 4 March 1425 for this Robert and others to travel to Bruges to sue for money due to the Scottish Crown.