Pheidippides in Wikipedia
Pheidippides (Greek: Φειδιππίδης, sometimes given as Phidippides or Philippides), hero of Ancient Greece, is the central figure in a story which was the inspiration for a modern sporting event, the marathon.
The traditional story relates that Pheidippides (530 BC–490 BC), an Athenian herald, was sent to Sparta to request help when the Persians landed at Marathon, Greece. He ran 240 km (150 miles) in two days. He then ran the 40 km (25 miles) from the battlefield near Marathon to Athens to announce the Greek victory over Persia in the Battle of Marathon (490 BC) with the word "Νενικήκαμεν" (Nenikékamen, "We have won") and collapsed and died on the spot from exhaustion.
Most accounts incorrectly attribute this story to the historian Herodotus, who wrote the history of the Persian Wars in his Histories (composed about 440 BC). In reality, the traditional story appears to be a conflation from several different ancient Greek sources having varying levels of authenticity.
Robert Browning gave a version of the traditional story in his 1879 poem Pheidippides.
("Fennel-field" is a reference to the Greek word for fennel, marathon, the origin of the name of the battlefield.)
It was this poem which inspired Baron Pierre de Coubertin and other founders of the modern Olympic Games to invent a running race of 42 km called the Marathon.
The story is improbable, as the Athenians would more likely have sent the messenger on horseback. However, it may have been possible that they used a runner, as a horse's movements would have been hindered by the rocky, mountainous terrain. In any case, no such story appears in Herodotus. The relevant passage of Herodotus (Histories, Book VI, 105...106 [ 1 ]) is:
Before they left the city, the Athenian generals sent off a message to Sparta. The messenger was an Athenian named Pheidippides, a professional long-distance runner. According to the account he gave the Athenians on his return, Pheidippides met the god Pan on Mount Parthenium, above Tegea. Pan, he said, called him by name and told him to ask the Athenians why they paid him no attention, in spite of his friendliness towards them and the fact that he had often been useful to them in the past, and would be so again in the future. The Athenians believed Pheidippides's story, and when their affairs were once more in a prosperous state, they built a shrine to Pan under the Acropolis, and from the time his message was received they held an annual ceremony, with a torch-race and sacrifices, to court his protection.
On the occasion of which I speak - when Pheidippides, that is, was sent on his mission by the Athenian commanders and said that he saw Pan - he reached Sparta the day after he left Athens and delivered his message to the Spartan government. "Men of Sparta" (the message ran), "the Athenians ask you to help them, and not to stand by while the most ancient city of Greece is crushed and subdued by a foreign invader; for even now Eretria has been enslaved, and Greece is the weaker by the loss of one fine city." The Spartans, though moved by the appeal, and willing to send help to Athens, were unable to send it promptly because they did not wish to break their law. It was the ninth day of the month, and they said they could not take the field until the moon was full. So they waited for the full moon, and meanwhile Hippias, the son of Pisistratus, guided the Persians to Marathon.
The significance of this story is only understood in the light of the legend that the god Pan returned the favor by fighting with the Athenian troops and against the Persians at Marathon. This was important because Pan, in addition to his other powers, had the capacity to instill the most extreme sort of fear, an irrational, blind fear that paralysed the mind and suspended all sense of judgment - panic.
Herodotus was writing about 30 to 40 years after the events he describes, so it is reasonably likely that Pheidippides is a historical figure. If he ran the 246 km over rough roads from Athens to Sparta within two days, it would be an achievement worthy of remembrance. Whether the story is true or not, it has no connection with the Battle of Marathon itself, and Herodotus's silence on the subject of a herald running from Marathon to Athens suggests strongly that no such event occurred.
The first known written account of a run from Marathon to Athens occurs in the works of the Greek writer Plutarch (46–120), in his essay On the Glory of Athens. Plutarch attributes the run to a herald called either Thersippus or Eukles. Lucian, a century later, credits one "Philippides." It seems likely that in the 500 years between Herodotus's time and Plutarch's, the story of Pheidippides had become muddled with that of the Battle of Marathon, and some fanciful writer had invented the story of the run from Marathon to Athens.
While the marathon celebrates the mythical run from Marathon to Athens, since 1982 an annual footrace from Athens to Sparta, known as the Spartathlon, celebrates Pheiddipides's at least semi-historical run across 250 km of Greek countryside.
Phidippĭdes in Harpers Dictionary of Classical Antiquities (1898)
or Philippĭdes (Φειδιππίδης, Φιλιππίδης). A courier was sent by the Athenians to Sparta in B.C. 490 to ask for aid against the Persians, and arrived there on the second day from his leaving Athens. On his return to Athens he related that on his way to Sparta he had fallen in with Pan on Mount Parthenium, near Tegea, and that the god had bid him ask the Athenians why they paid him no worship, though he had been hitherto their friend, and ever would be so. In consequence of this revelation they dedicated a temple to Pan after the battle of Marathon, and honoured him thenceforth with annual sacrifices and a torch-race (Herod.vi. 105; Pausan. i. 28, 4).