Sentence:  And in the meanwhile, Society shivered a little feverishly, filled now with the scions of those who had come over with the Jewish and American Conquests. Escutcheons were becoming valueless, how <WSD>sinister</WSD> soever the blots and clots upon them. 
Meaning of the word marked with <WSD> tags:  Inauspicious, ominous, unlucky, illegitimate (as in "bar sinister").