Note 222 — Chapter IV · ITALY.
Reading edition
Raynald. Annal. ann. 1231, No. 13-18.--Constit. Sicular. Lilt. I. Tit. i.--Rich. S. Germ. Chron. (Muratori, S. R. I. VII. 1026).--Vit. Gregor. PP. IX. (Ib. III. 578).--Hist. Diplom. Frid. II. T. IV. pp. 299-300, 409-11.--Verri, Storia di Milano, I. 242.--Bern. Corio, Hist. Milanese, ann. 1228.