Here are the rules, basically as used in the Corunna game. They are not exactly the same, because while consolidating them for publication I made some tweaks.
I make them freely available to the wargaming community, but would ask that I am credited in any distributed copy.
If any anomalies, contradictions or other faults are found, feedback is appreciated. And yes, I know I got the datestamp wrong!
Thanks for making EIH available. Looks like an interesting alternative to the Portable Wargame for large battles, whilst still using a square grid.