In an introductory paper, the vortex sponge was shown to be governed, in restricted cases, by Maxwell's free-space equations. In the present paper, analogs to electric and magnetic energies and Poynting's theorem are derived by simple mechanical considerations. Rotational stability, suggested originally by MacCullagh as a fundamental property of a luminiferous ether, turns out to be a quality of the medium, as do the stresses introduced by Faraday and Maxwell to explain the mechanical actions of electric and magnetic fields. A rudimentary model for the electrostatic field is suggested on this basis. A conventional definition of charge and the laws of Coulomb and Biot complete Maxwell's equations for cases including charges and currents. A model of the magnetic field based on the bulk rotation and the Faraday-Maxwell stresses, combined with the laws of Coulomb and Biot, permits the inference of the Lorentz force. Although numerous gaps occur in the treatment, it seems not unlikely that the vortex sponge has the qualities described by the electromagnetic field equations as well as the mechanical attributes required for a model of these fields.