Maxwell's real breakthrough in electromagnetic theory was positing the displacement current, which is the rate of change of electric flux density , dD/dt. There was no empirical reason to expect this, but it made the equations nicely balanced by adding a term analogous to dB/dt. Everything else in the equations predated Maxwell, but he unified them and, by adding displacement current, git EM radiation to pop neatly out. It has - rightly, I think- be described as one of the greatest intellectual leaps ever made.
Incidentally, Maxwell's own house, Glenlair in Galloway, is regularly open to visitors. The main part of the house was destroyed by fire years ago, but the surviving bit is under restoration. While in the area you can also visit Maxwell's grave in Parton kirk yard and see a memorial window in Corsock kirk, for which (the building) he paid. It's claimed to have the only stained glass representation of Maxwell's equations in the world.