When it was his turn, Poole saw only a speck of light, glowing brilliantly.
Marsden seemed irritated at their subdued reaction. ‘Are you impressed? No? You should be. That, my unsatisfactory audience, is a magnetic monopole. Manufactured using the Io flux tube energies, and held in place with a strong magnetic cage.’
-Xeelee: Vengeance, Ch. 54