2.2 . Pyrrhon of Elis (365-275 B. C.)
Pyrrhon is one of the earliest Greek philosophers likely to have had a direct contact with India . According to Diogenes Laertios (second cent. A. D.) , the ancient historian of philosophy, Pyrrhon was at first a painter and his works were seen in the gymnasium at Elis . Later Pyrrho took to philosophy influenced by the works of Democritus(c.400BC). He studied philosophy with a teacher of the school of Megara (Magerian dialectics) and then with Anaxarchus (340BC), the pupil of Democritus.
2.2.1. Pyrrhon was one of the philosophers who traveled with Alexander the Great on his expedition to India . He apparently met some Indian philosophers during his stay in India . His experiences in India may have had some effect on him because on his return to India he preferred to live in solitude and in poverty. Yet, he was highly honoured by the Elians and the Athenians, who conferred upon him the rights of citizenship. He did not put his ideas into writing. His ideas have survived only through fragmentary citations in later authors and mainly through the writings of his pupil Timon of Philus. Timon admired his teacher for his modesty and his tranquil way of life.
3.Patrokles:
The 3rd century B. C. has been rather kind to historians. A good number of reports of Greeks who traveled to India during this period have come down to us, as compared to the later periods. During this period, the rulers of Persia and Greece sent their emissaries to India . It is said, an officer named Petrokles (c.280 BC) visited India and returned with some useful geographic information. However, nothing much is known about Petrokles.
(Source :
4.Eudoxos of Kyzikos (Eudoxus of Cyzicus ) :
The later half of the first century and the period thereafter in the second century BC did not witness frequent contacts between India and the Greek world because the land route was blocked by the Parthian empire (successor to the Seleukids). As regards the sea route via the Red Sea and the Indian Ocean , the sea captains had not yet learned to utilize the monsoon trade winds and had forgotten the route found by Skylax. There was, however, some improvement in the traffic following the movement of the Bacterian kings into the Indus valley. This rendered the land route less dangerous.
4.1. The beginning of the second century saw an upsurge in the sea travel between Egypt and India . This continued until the third century. It all began with the voyage undertaken by one Eudoxos of Kyzikos
4.2. By all accounts, Eudoxos of Kyzikos was a remarkable person. He was a highly cultured sea captain who was described as a geographer, fighter, diplomat and intrepid trader and one who explored uncharted lands beyond the Mediterranean . He left behind the story of his expedition from Egypt to India . He is the hero of popular novels and films.
4.3. Eudoxus (c.130BC) was born in Cyzicus an ancient town of Mysia in Asia Minor , situated on the shore side of the present peninsula of Kapu-Dagh (Arctonnesus). Nothing much is known about Eudoxus’early life. There are some references to his unhappy married life and to a series of voyages across the Indian Ocean seeking wealth for his family shipping concerns.
4.4. According to Strabo (64BC to 24 AD -a Greek historian), quoting Posidonius (135BC to 51 BC -a Greek philosopher and historian), while Eudoxus was in Alexandria , he met a nearly dead shipwrecked Indian rescued from the Red Sea shore. After the seaman recovered and learnt a smattering of Greek, he informed that he was the sole survivor of a ship that sailed from India . Eudoxus was exited with this piece of news and thereafter convinced the Egyptian king Ptolemy VIII (Physkon) to sponsor an expedition to India , with the rescued Indian seaman as the guide. Eudoxus set sail in 118 BC from Berenice Harbor with the Indian as the guide. The voyage after having reached Muzuris in South India , Kerala , located below Calicut , returned to Egypt after 70 days. Eudoxus returned with a rich cargo of precious stones and aromatics. Ptolemy VIII promptly confiscated the cargo. Ptolemy VIII, not long after, died in 116BC; bequeathing Kyrenaika to his illegitimate son Ptolemy Apion and Egypt to Kleopatra III’s son with herself acting as the regent.
4.5. Posidonius recounts that the second voyage of Eudoxus to India came about in 116 BC at the command of Kleopatra III because she was desirous of procuring more precious gems and perfumes from India . The second voyage was, however, not as smooth as the first one. On his return voyage, Eudoxus was blown off-course and stranded on a shore below Ethiopia (perhaps below Cape Guardafui , Somalia ). After a series of misadventures, Eudoxus finally returned, with his precious cargo, to Egypt in around 114 BC. By which time Ptolemy IX had become the pharaoh. Yet again Eudoxus met with the same fate when the Pharoah Ptolemy IX confiscated the cargo just as his father did earlier.
4.6. What followed thereafter was a most wonderful adventure story. Eudoxus intending to embark on a third voyage to India by circumnavigating Africa ( Alexandria ) built a big ship. As a true showman, he gave wide publicity to the voyage, put music girls on board along with physicians and artisans, and set sail to India in great style. Because of a number of mishaps on the way, Eudoxus abandoned the voyage to India and eventually landed in Cadiz in what is now Spain . Strabo remarks that Eudoxus was always attended by good fortune.
4.7. Long after Eudoxus voyage Ptolemy XII (80 to 51 BC) created a special post titledCommander of the Red and Indian Seas to organize and encourage trade with India . The best-known occupant of this office was Callimachus the epistrategos, who was the Commander between 78 BC and 51 BC.
Incidentally, the captain of Eudoxus of Cyzicus’ship that sailed to India , according to some, was Hippalus. Who was this Hippalus?Was he real?
(Sources: http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Strabo/2C*.html#3.4
http://en.wikipedia.org/wiki/Indian_maritime_history )
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5. Hippalus :

The contents of the book titled Periplous of the Erythraean Sea (“Circumnavigation of the Erythrean i.e., Red Sea”), written in around 75 to 90 AD by an unknown author presumed to be a Greek merchant sailor, indicates, the author had access to first-hand information about the ports in western India .The book mentions a series of ports along the Indian coast, including Muziris (Pattanam?), Colchi (Kochi?), Poduca, and Sopatma. The book is narrated on a navigation itinerary basis, stopping at every point (a ‘port of call’) to enumerate merchandises, details about the local routes of trade, information about the natural environment, the political establishment, and the cultural and religious affairs and/or traits of the port in question. According to M.S. Megalommatis, a scholar, judging by the language of the text one could say Greek was not the mother tongue of the author. Most probably, he was an Alexandrian Egyptian captain and merchant who voyaged these seas and had intimate knowledge of the areas mentioned in the text.
5.1.The book also records the accomplishment of a certain Hippalus who, it says, understood the patterns of the Indian monsoons and discovered a sea-route from the Red Sea to Southern India . The book also makes a special references the port of Kodanganallur (anglicised to Cranganore, and also known as Muziris or Shinkli), in present day Kerala on India ‘s West coast. Pliny refers to this port as primum emporium Indiae.
5.2. There are two issues concerning Hippalus that are debated (a) the Sea route from the Red Sea to the Indian ports were already known to the earlier Greeks. Hippalus did not discover them; and (b) Hippalus was not a real person and that the term was coined to represent a system of trade winds or to the sea/sea route.
5.3.As regards the first issue, we know that Skylax as far back as in fifth century BC traced a sea route to and out of the Red Sea . Further, as recorded in Arrian’s Indica ( 21, 1), Nearchus, a Macedonian General and a friend of Alexander, commanded a fleet to carry the men back from India to Persia and Mesopotamia . It is said, he was the first to realize the importance of the monsoon winds for sailing in that region, he, therefore waited for the commencement of the northeast monsoon to begin the voyage from India .After his conquest, Alexander sent out voyages of exploration to Arabia and the Caspian Sea but he died soon thereafter. (Apart from this ,the Arabians and Indians must, of course, have known and made use of the monsoon winds for centuries.)
Perhaps, because these events were too far back in time, they were either forgotten or lost in antiquity.
5.4. The other issue, which questions the existence of Hippalus, is a little more debatable. To start with, Pliny (79AD) does not mention him ; and in Ptolemy (c.168AD), Hippalus is the name of a sea. The French historian Andre Tchernia explains that Pliniy’s contention was because in the earlier times, the name of the wind was written as Hypalus and it was only in the Roman times the spelling Hippalus came into use . Some historians, therefore, wonder if Hippalus were to be a real person, then it is strange that his exploits were hardly known to the succeeding generations

Since the Indian Ocean is bound on the north by a large land mass, the effects of “differential heating” are intense. The air mass over the subcontinent, consequently, heats up, expands, and rises up in to the air. This causes a low-pressure area over the northern and central Indian subcontinent. To fill up this void, the cooler, heavier and moisture-laden winds from the Indian Ocean rush on to the subcontinent. The damp, chilly layer that hangs Over India will be as thick as three miles.
As the cool air arrives, the winds also shift. During the dry season, the winds blow offshore – from land to sea. Then, as the monsoon begins, the winds blow onshore – from sea to land. This phenomenon perhaps explains why the early Arabs named the monsoon “Mausin,” or “the season of winds.” The southwest Monsoon generally begins around the middle of June and lasts until September.
(Sources: http://www.pbs.org/wnet/nature/monsoon/html/body_make.htm
http://en.wikipedia.org/wiki/Monsoon
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5.7. The real impotence of this phenomenon to the Greek/Egyptian sailors was that in the Indian winters the winds blow from the Sea on to the subcontinent; While in the Indian dry season, the winds reverse and blow from land to the sea. The Greeks could, therefore, sail into India during the Indian winter and sail back to Egypt during the Indian summer; thus taking advantage of favorable winds on both occasions .This rendered the sea crossing a lot easier and faster than before. It is said, Hippalus set out in August sailing into the wide Arabian Sea directly towards the Malabar Coast . Further, Dr. Lionel Casson in his recent translation and commentary on “The Periplus Maris Erythraei,” says the ships left Egypt in July to take advantage of strong winds out of the north in the Red Sea and while returning, the ships usually departed in December or January to catch a favorable shift in winds.
The Periplus of the Erythraean Sea primarily focuses on two trade routes originating at Egyptian ports: one, on the East African coast as far as Tanzania, and the other via the Arabian peninsula and Persian Gulf to western India. The author writes in detail of numerous cities, ports and harbours on these routes but India’s western coast, from Karachi down to Kanyakumari on the southernmost tip, accounts for nearly half the narrative.
(http://nefertiti.iwebland.com/timelines/topics/means_of_transportation.htm#rem13
Were they both talking about the same person?
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8.Theophilos:
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Philip Mayerson in his essay A Confusion of Indias: Asian india and African India in the Byzantine Sources , says that after the fourth century the term India came to be applied rather loosely to refer to the subcontinent India , Axum/Ethopia or even to South Arabia and this has lead to much confusion. Mr. Mayerson says, Theophilos was not sent to India but was sent to perform missionary work among Homerites in Arabia Felix.
9. Kosmas Indikopleustes (Indian voyager):
In the words of Philip Meyerson , Christian Topography is the work of an anonymous Alexandrian merchant and an aspiring theologist who centuries later was given the name Cosmos and soubriquet of Indicopleustes although he never visited India .
(Sources: http://en.wikipedia.org/wiki/Cosmas_Indicopleustes
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It is sad that the Greek/Egypt trade with India collapsed after third century AD. The fall of the Roman Empire , and the succeeding dark ages brought instability to Western Europe and caused a near collapse of the trade network leading to a massive contraction of interregional trade. The Greek/Egypt and India trade was one of its early causalities.
Please also read : Greeks in India before Alexander