Conversation so far:
What was Thomas Nast's career like?
German-born American caricaturist and editorial cartoonist Thomas Nast, the Father of the American Cartoon, was associated with Harper's Weekly from 1859 to 1860 and from 1862 until 1886.
What did Thomas Nast do in England?
In February 1860, Thomas Nast went to England for the New York Illustrated News to depict the prize fight between the American John C. Heenan and the English Thomas Sayers
What sporting event was Thomas Nast depicting in England in 1860?
In February 1860, Thomas Nast went to England for the New York Illustrated News to depict the prize fight between the American John C. Heenan and the English Thomas Sayers
What did Thomas Nast do for the prize fight between the American John C. Heenan and the English Thomas Sayers?
Thomas Nast depict the prize fight between the American John C. Heenan and the English Thomas Sayers
What else is notable about Thomas Nast's career besides depicting the fight between the American John C. Heenan and the English Thomas Sayers?
After the American Civil War, Nast strongly opposed the Reconstruction policy of President Andrew Johnson
What did Thomas Nast do to oppose the Reconstruction policy of President Andrew Johnson?
Thomas Nast depicted President Andrew Johnson in a series of trenchant cartoons that marked Nast's great beginning in the field of caricature“
Was Thomas Nast involved in politics?
Thomas Nast played important role during the presidential election in 1868, and Ulysses S. Grant attributed his victory to the sword of Sheridan and the pencil of Thomas Nast.“
What else did Thomas Nast draw besides political cartoons?
Thomas Nast received a few commissions for oil paintings and drew book illustrations.
Did Thomas Nast draw for magazines?
After Harper's Weekly, Thomas Nast contributed cartoons in various publications, notably the Illustrated American,
Are there any other intereting aspects about the Thomas Nast article?
In 1892, Thomas Nast took control of the New York Gazette, and renamed it Nast's Weekly. He used the Weekly for his cartoons supporting Benjamin Harrison for president.

Question: How long did he work there?
Self-contained rewrite: How long did Thomas Nast work at Nast's Weekly?