. We report on new measurements of the electric Generalized Polarizability (GP) of the proton α E in a kinematic region where a puzzling dependence on momentum transfer has been observed, and we have found that α E = ( 5 . 3 ± 0 . 6 s t a t ± 1 . 3 s y s ) 10 - 4 fm 3 at Q 2 = 0 . 20 (GeV/ c ) 2 . The new measurements, when considered along with the rest of the world data, suggest that α E can be described by either a local plateau or by an enhancement in the region Q 2 = 0 . 20 (GeV/ c ) 2 to 0.33 (GeV/ c ) 2 . The experiment also provides the first measurement of the Coulomb quadrupole amplitude in the N → Δ transition through the exploration of the p ( e , e p ) γ reaction. The new measurement gives C M R = ( - 4 . 4 ± 0 . 8 s t a t ± 0 . 6 s y s ) % at Q 2 = 0 . 20 (GeV/ c ) 2 and is consistent with the results from the pion electroproduction world data. It has been obtained using a completely different extraction method, and therefore represents a strong validation test of the world data model uncertainties.