  Multipole analyses of the p(g,pi0), p(g,pi+) and p(g,g) reactions are carried
out using different data sets. With sufficient constraints from polarization
observables, the ratio of E2/M1 transition amplitudes for N->delta (EMR)
appears to be largely insensitive to differences between recent p(g,pi0) cross
section measurements. We deduce a current best estimate of EMR = -(2.85 +/-0.34
+/-0.21)%. Back angle Compton cross sections require a value for the backward
spin polarizability that is significantly lower than previous expectations,
with a magnitude that is coupled to the (g,pi) cross sections.
