  First results from lattice QCD revealing the chiral nonanalytic behavior of
nucleon and Delta baryon magnetic moments are presented. Numerical simulations
in the light quark mass regime employing the nonperturbatively O(a)-improved
conserved vector current are enabled via FLIC fermions. Quenched chiral
perturbation theory for the nucleon and Delta magnetic moments is derived to
next to next to leading nonanalytic order. Numerical simulation results for the
proton and Delta baryon magnetic moments in quenched QCD reveal dramatic
signatures of the quenched meson cloud, which are in accord with the
predictions of quenched chiral perturbation theory.
