Footnote 118
When the Pope finally declared Humphrey and Jacqueline's marriage
to have been null (since they were first cousins), Gloucester married
his mistress Eleanor Cobham and took Bedford's advice to
stay out of the Duke of Burgundy's war with Jacqueline. The latter
was forced to surrender when her principal city (Gouda in Holland)
was besieged; the subsequent Treaty of Delft made the Duke of Burgundy
heir and guardian of her lands (being her cousin as well, Burgundy had a
claim to Hainault, Holland, and Zeeland, and had been appointed as the
heir by Jacqueline's first husband, Duke John IV of Brabant - who,
for the record, was also a cousin of Jacqueline and Burgundy).
Among other sources, see:
Seward's "The Hundred Years War" ,
p. 207;
"Philip the Good",
pp. 48 - 49;
"The Golden Age of Burgundy",
p. 142; and
Neillands' "The Hundred Years War", p. 249.