Let SUC(2, L) denote the projective moduli variety of semistable rank 2 vector bundles with determinant L ∈ Pic(C) on a smooth curve C of genus g > 2; and suppose that degL is even. It is well-known that, on the one hand, the singular locus of SUC(2, L) is isomorphic to the Kummer variety of the Jacobian; and on the other hand that when C is nonhyperelliptic SUC(2,O) has an injective morphism i...