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

Question: What sporting event was he depicting?
Self-contained rewrite: What sporting event was Thomas Nast depicting in England in 1860?