  In a number of papers by Edge, and in a related paper by Fano, several
properties are discussed of the family of scrolls of degree 8, in the complex
projective space, whose plane sections are projected bicanonical models of a
genus 3 curve C. This beautiful subject is implicitely related to the moduli of
semistable rank two vector bundles on C with bicanonical determinant. We
revisit and reconstruct this matter in modern terms with a modular point of
view. This paper is the refereed version of a contribution to a volume in honor
of W.L Edge, to be published by European Journal of Mathematics.
