Answer:
Thomas Mast was a key figure in the prosecution of Boss Tweed, a notorious political boss in New York City in the mid-1800s. Mast was a cartoonist for Harper's Weekly, a prominent magazine of the time, and his illustrations played a critical role in exposing Tweed's corruption and bringing him to justice.
Mast created a series of political cartoons that exposed the corrupt practices of Tweed and his associates. These cartoons, which were published in Harper's Weekly, depicted Tweed and his colleagues as greedy and corrupt, often using exaggerated imagery to emphasize their dishonesty.
Mast's cartoons were widely circulated and had a significant impact on public opinion. They helped to raise awareness of Tweed's corruption and prompted calls for his prosecution. In addition to his cartoons, Mast also provided testimony in court and served as a key witness in the case against Tweed.
Ultimately, Tweed was convicted of multiple counts of corruption and sentenced to prison. The role of Mast's cartoons in bringing about Tweed's downfall was widely recognized, and Mast was celebrated as a hero in the fight against political corruption.