Gridkeeper's playlist also has a video that mentions the first discoveror of bio electrical frequency fields of living organisms.. The very info that Hulda Clark based her work on..

So that alone validates Hulda even one step more... not just taking her words for that her methods work... but seeing where it really came from.. not in her own words..
but from another source...

Sorry i dont remember which video, and there are a vast collection of videos on Gridkeepers playlists... But i think it was on this playlist somewhere...
http://www.youtube.com/watch?v=yj_kb1yrE-w&NR=1
maybe some numbers or parts earlier than part 13...


Cheers..