James mark Sullivan was part of the post-famine Irish immigration to the United States in the late 19th century. Overcoming family misfortune, he moved from newsboy to journalist to Yale-educated lawyer. Relocating to New York City, his association with Tammany Hall involved him in the "Crime of the Century" Becker-Rosenthal murder case, a role not previously explored. Sullivan's involvement won him a patronage appointment as ambassador to Santo Domingo...