The sections that follow what I quoted above also discuss St. Robert:
Texts For The Infallibility Of The Popes Judgement In Points Of Faith Texts For The Same In Point Of Manners Of The Popes Temporall PowerHobbes seems to have a nominalistic understanding of papal authority (anti-papistry and nominalism go hand-in-hand since at least Occam). He also thinks a pope has no legislative power, and that he only has temporal power over territories he owns.
Also, in the last section linked above, he discusses the Lateran Council, which he quotes: "If a King at the Popes admonition, doe not purge his Kingdome of Haeretiques, and being Excommunicate for the same, make not satisfaction within a year, his subjects are absolved of their Obedience."