Rowan spent thirty-six hours instructing and manipulating the memories of the other "Rowan." During that time Eva had woken up and lost consciousness three more times, each time her screams grew less shrill and she was awake for longer.
If she failed to assimilate the memory for another three more, Rowan would have to remove the rememberings from her head until she became strong enough to handle his vision. He would have to console himself with the fact that soon, no one else would be able to walk the same path as he could, they would all be left behind.
Real power was a lonely thing.
Unlike him, Eva's path to power was a bit upside-down. As far as he could tell, her abilities were rooted in her memories and her past, as she was not growing stronger but instead, she was recovering what she had once lost.