*hugs mia/susannah* Thinking deep? I think as deep as a puddle after the light summer rain.
Brainslinger, I really like your post. It's absolutely fascinating.
Anyway a new theory has just come to my mind.
Calvin's great-great-granddad might have dreamt of Gilead and Roland... might have seen other worlds in his dreams because of the rose. Like Calvin.
Calvin says to Eddie that he does dream of that vacant lot quite a lot but Eddie feels Calvin keeps his secret as well.
So Tower's great-great-granddad wanted to be sure if that gunslinger he had dreamt of ever visited his world would get any help he would need from his family.