Oh yeah, there's got to be a lot more that Kel has done. It seems to me he created, or told someone else how to create, the 'Bands of Mourning'.
Goodness this changes everything about what I thought Kel was up to and could do. I though he was only working 'through' Marsh, now we know he was probably the one that convinced Spook to write the book. I wonder where he is during Era 2.