In England from Wicliffe to Henry VIII - James Aitken Wylie

Popes continued to afflict the adherents of the
Papacy. The cardinals, more earnestly than ever,
resolved to bring the matter to an issue between the
Pope and the Church; for they foresaw, if matters
went on as they were doing, the speedy ruin of
both.
Accordingly they gave notice to the princes and
prelates of the West, that they had summoned a
General Council at Pisa, on the 25th of March next
ensuing (1409). The call met a universal response.
"Almost all the prelates and venerable men of the
Latin world," says Walsingham, "repaired to Pisa."
The Council consisted of 22 cardinals, 4 patriarchs,
12 archbishops in person and 14 by proxy, 80
bishops in person and a great many by their
representatives, 87 abbots, the ambassadors of
nearly all the princes of Europe, the deputies of
most of the universities, the representatives of the
chapters of cathedral churches, etc. The numbers,
rank, and authority of the Council well entitled it to
represent the Church, and gave good promise of the
extinction of the schism.
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