Sentence:  ‘... And I tell you that the slightest suspicion of my loyalty could be ruin for me, ruin! If it were ever breathed that I were even a <WSD>sympathiser</WSD> with this rebellion, there iss an end of me.' 
Meaning of the word marked with <WSD> tags:  A person who sympathizes (with a political cause, a side in a conflict, etc.); a supporter.