  An ancient Hamiltonian of electrons with entangled spin and orbital degrees
of freedom is re-examined as a model of magneto-electric multipoles. In the
model, a magnetic charge and simple quantum rotator are tightly locked in
action, some might say they are enslaved entities. It is shown that
magneto-electric multipoles almost perfectly accord with those inferred from an
analysis of magnetic neutron diffraction data on a ceramic superconductor
(YBCO) in the pseudo-gap phase. Nigh on perfection between Stone's model and
inferred magneto-electric multipoles is achieved by addition to the original
model of a crystal-field potential appropriate for the magnetic space-group
used in the published data analysis
