Working within the HPO (History Projection Operator) Consistent Histories
formalism, we follow the work of Savvidou on (scalar) field theory and that of
Savvidou and Anastopolous on (first-class) constrained systems to write a
histories theory (both classical and quantum) of Electromagnetism. We focus
particularly on the foliation-dependence of the histories phase space/Hilbert
space and the action thereon of the two Poincare groups that arise in histories
field theory. We quantise in the spirit of the Dirac scheme for constrained
systems.Comment: 26 page