I read a little greek, and the font on the page you link was very particular, ζ was like latin z, χ was like latin x and η was like latin n. Is this like how handwriting is like nowadays in greece, or particular to this font only?
It's the weird font. You 've got them right.
The tyrant in question was Cylon of Athens who staged a failed coup in 632 BCE leaving him only a would be tyrant.
It's always the would-be tyrants whose followers end up in mass graves.
Whats interesting is it looks like they were bound and killed somewhere else, then dragged into a shallow trench.
That's a horrible idea. I stand with those who oppose the mass murder of people, even ancient greek ones.