So this was one of Nast's most well-know caricatures of Tweed, showing how he bought the state Democratic convention. Some time later Tweed reportedly said, "Stop them damned pictures. I don't care so much what the papers say about me. My constituents don't know how to read, but they can't help seeing them damned pictures!"
And here is an updated verison of The "Brains."
The following is just a bonus image. Nothing to do with Nast or Tweed, just the Idiot, or should I say, the Boss?