Sentence:  I don't think poor Amelia cared anything about Brienne and Montmirail, or was fairly interested in the war until the abdication of the Emperor; when she clapped her hands and said prayers—oh, how grateful! and flung herself into George Osborne's arms with all her soul, to the astonishment of everybody who witnessed that <WSD>ebullition</WSD> of sentiment. 
Meaning of the word marked with <WSD> tags:  A sudden emotional outburst.