Roast Pig and Independence

"But what was most remarkable, Broadway being three miles long, and the booths lining each side of it, in every booth there was a roast pig, large or small, as the centre attraction. Six miles of roast pig! And that in New York City alone; and roast pig in every other city, town, hamlet, and village in the Union. What association can there be between roast pig and independence?"

--Frederick Marryat, describing a Fourth of July celebration (1837)