S NO FURTHER A MYSTERY

The form of Latin S occurs from Greek Σ by dropping 1 out with the four strokes of that letter. The (angular) S-form composed of 3 strokes existed like a variant of the 4-stroke letter Σ presently within the epigraphy of Western Greek alphabets, as well as a few and 4 strokes variants existed along with each other in the classical Etruscan alphab