[Footnote 13: Theobald, who is styled Heros by Liutprand,
was properly duke of Spoleto and marquis of Camerino, from
the year 926 to 935. The title and office of marquis
(commander of the march or frontier) was introduced into
Italy by the French emperors, (Abrege Chronologique, tom.
ii. p. 545 - 732 &c.)]