  New results on quasi-free $\eta$ photoproduction on the neutron and proton
bound in a deuteron target are presented. The $\gamma n \to \eta n$ quasi-free
cross section reveals a bump-like structure which is not seen in the cross
section on the proton. This structure may signal the existence of a relatively
narrow ($M\sim 1.68$ GeV, $\Gamma \leq 30$ MeV) baryon state.
