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Scylax of Caryanda was a renowned Carian explorer and writer of the 6th and 5th centuries BCE.
In about 515 BCE, Scylax was sent by King Darius I of Persia to follow the course of the Indus River and discover where it led. Scylax and his companions set out from city of Caspatyrus in Gandara, in today's Afghanistan. Scylax sailed down the river until he found it reached the sea. He then sailed west across Indian Ocean until he arrived at the Red Sea, which he also explored. He travelled as far as the Red Sea's western end at Suez, before returning to report to Darius I. His entire journey took thirty months.
Scylax also recorded information he knew about cities on the islands of the Mediterranean, including Crete. He was one of the first to mention the city of Kydonia on western Crete. Scylax was famous in the ancient world. He is mentioned by Strabo as an "ancient writer." According to the Suda, he also wrote (perhaps "in the decades around 480 B.C."[ ) a life of his contemporary, Heraclides of Mylasa (τὰ κατὰ Ἡρακλείδην τὸν Μυλασσῶν βασιλέα), who is mentioned in Herodotus 5.121.
The Periplus of Pseudo-Scylax, which dates from the 3rd century BCE, is a compilation apparently named in his honour.
The vessel depict on the stamp I can not give a type for it, most probably an imagination of the designer of the stamp, how he thinks a vessel around that time looks like.
Antigua and Barbuda 1991 $1 sg1289, scott1415
Source: http://en.wikipedia.org/wiki/Scylax_of_Caryanda

Scylax of Caryanda
The narrative about Scylax based on Herodotos. Recently, however, Dmitri Panchenko has argued persuasively, on the basis of apparent references to Scylax's work in the late Greek author Philostratos, that Scylax in fact travelled across North India, made his way down the Ganges, and arrived at Taprobane (Sri Lanka). He has also calculated the likely date of Scylax's departure for India as July 518 A.D.
Type Phoenician vessel Scylax of Caryanda called "gaulos." (γαύλους . Greek). (See. Http://galea-galley.livejournal.com/4814.html).The author of site writes: “Pseudo-Scylax of Caryanda in claim 112, we read: And the same traders - the Phoenicians; whenever they came to the island of Kern always came into the harbor at its γαύλους ... (gaulos)”. “Here it is difficult to argue anything against the most closely related type of merchant ships gaulos with the Phoenicians. As for the island of Kern, I (as I understand it, and not only me) failed to establish its accuracy location.However the island of Kern was quite significant that the author knew about it Periplus of Pseudo-Scylax of Caryanda in the fourth century A.D. For some time it remained an important outpost of the Carthaginians.”
I assume the ship of Scylax of Caryanda was like as on stamps.
Equatorial Guinea1974;0,15e;SG? Cambodge1993;200r;SG1308. Afghan1999;10000afs;SG? Israel1958;10p;SG143.
Source:Wicipedia. Galea-galley.livejournal.com/4814.html