The semicolon has a birth certificate
One printer, one type designer, one Latin essay about a volcano — and a punctuation mark that still starts arguments five centuries later.
Most punctuation marks just kind of accreted over centuries of scribal habit. The semicolon didn't. It was assembled on purpose in Venice in 1494, by the printer Aldus Manutius, for a specific book: Pietro Bembo's De Aetna, an essay about climbing Mount Etna. Manutius wanted a pause heavier than a comma but lighter than a colon, so his type designer, Francesco Griffo, welded the two together — literally, a comma's curve under a colon's dot — and cut it into metal.
No other mark in English has that kind of paper trail. We know the year, the city, the book, and the two men who made it. For decades afterward, punctuation wasn't governed by rules at all; humanist writers treated it as a matter of personal ear, the way you'd choose where to breathe in a sentence.
Cecelia Watson traces what happened next in Semicolon: how a mark invented as one printer's taste call got dragged, centuries later, into court cases, style-guide holy wars, and arguments about whose English counts as correct. It has been legislated, litigated, and loved.
A piece of type designed to slow a reader down for half a beat somehow never learned to slow down itself.