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Factional Politics: The Ostracism of Themistokles A group of ostraka found together in a pit on the North Slope of the Acropolis is of special interest. There were 190 ostraka, mostly the round feet of ... Factional Politics: The Ostracism of Themistokles A group of ostraka found together in a pit on the North Slope of the Acropolis is of special interest. ... Three samples from each of four hands are represented in the 12 ostraka here; letter forms and sizes as well as incised lines show the characteristics of individual handwriting. ... Seen in retrospect, Themistokles was as great a figure in Athenian history. When a great find of silver was made in southern Attica, it was he who convinced the Athenians not to distribute the money among themselves but to spend it building a great fleet of 200 triremes (war ships).