Pasquale Villari,
The Two First Centuries of Florentine History
“ Accordingly the Ghibelline domination in Florence was approaching its end. In fact, from the moment that the emperor withdrew into Apulia, already stricken with mortal disease, the Guelphs showed so much boldness that the Ghibellines decided on a fresh expedition to oust them from the Castle of Ostina, in the Valdarno, where they had assembled in great force. But while laying siege to the stronghold the Ghibellines were compelled to keep a strong reserve at Figline to protect their rear from the many Guelph partisans lurking at Montevarchi. ”
