More on Sampi from Infoplease:

• Sampi - Sampi A Greek numeral. (See Episemon.) Source: Dictionary of Phrase and Fable, E. Cobham Brewer, ...
• Episemon - Episemon in Greek numerals, is a sign standing for a numeral. Thus, episemon bau generally called ...
• Dictionary of Phrase and Fable: S - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "S"