Who was the greek messenger who delivered the message in the Battle of Marathon

The common story is Pheidippides. He was already dead, having run to Sparta to summon them to the battle, dying on his return from a 120 mile run.

In fact the news of the battle at Marathon was brought by the whole 9000 Athenian warriors who ran back to Athens after the battle to ward off a seaborne attack on the city in their absence.