When Aldo found Roland, he was analyzing and inferring the new nodes and routes of Language Proficiency in his lab.
By Roland's estimation, since the spell could let the recipient understand what other people said, it could certainly let him understand what they wrote when he found the correct route of nodes. There must be other effects if he connected the hundred of nodes in different ways.
Deduction, experiment, failure, recording… The whole process was repeated again and again.
Roland was completely dedicated to his magic experiment. Although his notebook was invisible for outsiders, his mental power that was spreading and collapsing every once in a while was obvious.
The door of the lab was open. Standing at the door, Aldo watched Roland doing unknown experiments and sensed his gathering and collapsing power.
He observed Roland's pained face when his mental power collapsed.
