what's the meaning of the last sentence?
Again Phrynne shifted in her sleep: this time more convulsively, so that she nearly woke. For some reason the two men remained speechless and motionless until she was again breathing steadily. Against the silence within, the bells sounded louder than ever. It was as if the tumult were tearing holes in the roof.
Q： what's the meaning of "more convulsively", especially the word "convulsively"?
Q: what's the meaning of the last sentence?