William Smith,
A Smaller History of Greece: from the Earliest Times to the Roman Conquest
“ Marathon became a magic word at Athens. The Athenian people in succeeding ages always looked back upon this day as the most glorious in their annals, and never tired of hearing its praises sounded by their orators and poets. And they had reason to be proud of it. It was the first time that the Greeks had ever defeated the Persians in the field. It was the exploit of the Athenians alone. It had saved not only Athens but all Greece. If the Persians had conquered at Marathon, Greece must, in all likelihood, have become a Persian province; the destinies of the world would have been changed ”
