[Footnote 88: The original materials for the crusade of
Frederic II. may be drawn from Richard de St. Germano (in
Muratori, Script. Rerum Ital. tom. vii. p. 1002 - 1013) and
Matthew Paris, (p. 286, 291, 300, 302, 304.) The most
rational moderns are Fleury, (Hist. Eccles. tom. xvi.,)
Vertot, (Chevaliers de Malthe, tom. i. l. iii.,) Giannone,
(Istoria Civile di Napoli, tom. ii. l. xvi.,) and Muratori,
(Annali d' Italia, tom. x.)]