 In a charter of 1384 Sir Robert is mentioned as Lord Justice of Scotland, and in a charter that year by Richard Edgar to Robert Edgar of Wedderlie, "Robertus Lawider Dominus de la Basse" appears as a witness and 

Froissart mentions "Sir Robert Lauder, a renowned hero" as having been present at the Battle of Otterburn which took place on 19 August 1388.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".Sir Robert Lauder of The Bass took part in the Battle of Nesbit Moor on 22 June 1402, and was captured.