one might, by reciters, be easily substituted for the other.

The tradition, upon which the ballad is founded, is universally current
in the Mearns; and the editor is informed, that, till very lately, the
sword, with which Sir Hugh le Blond was believed to have defended
the life and honour of the queen, was carefully preserved by his
descendants, the viscounts of Arbuthnot. That Sir Hugh of Arbuthnot
lived in the thirteenth century, is proved by his having, in 1282,
bestowed the patronage of the church of Garvoch upon the monks of
Aberbrothwick, for the safety of his soul.--_Register of Aberbrothwick,
quoted by Crawford in Peerage._ But I find no instance in history, in
which the honour of a queen of Scotland was committed to the chance of
a duel. It is true, that Mary, wife of Alexander II., was, about 1242,
somewhat implicated in a dark story, concerning the murder of Patrick,
earl of Athole, burned in his lodging at Haddington, where he had gone
to attend a great tournament. The relations of the deceased baron
accused of the murder Sir William Bisat, a powerful nobleman, who
appears to have been in such high favour with the young queen, that
she offered her oath, as a compurgator, to prove his innocence. Bisat
himself stood upon his defence, and proffered the combat to his
accusers; but he was obliged to give way to the tide, and was banished
from Scotland. This affair interested all the northern barons; and it
is not impossible, that some share, taken in it by this Sir Hugh de
Arbuthnot, may have given a slight foundation for the tradition of the
country.--WINTON, B. vii. ch. 9. Or, if we suppose Sir Hugh le Blond
to be a predecessor of the Sir Hugh who flourished in the thirteenth
century, he may have been the victor in a duel, shortly noticed as
having occurred in 1154, when one Arthur, accused of treason, was
unsuccessful in his appeal to the judgment of God. _Arthurus regem
Malcolm proditurus duello periit._ Chron. Sanctae Crucis ap. Anglia