  The role of monopoles in quenched compact QED has been studied by measuring
the cluster susceptibility and the order parameter $n_{max}/n_{tot}$ previously
introduced by Hands and Wensley in the study of the percolation transition
observed in non-compact QED. A correlation between these parameters and the
energy (action) at the phase transition has been observed. We conclude that the
order parameter $n_{max}/n_{tot}$ is a sensitive probe for studying the phase
transition of pure gauge compact QED.
