"One can always hope for an easier solution..." The Professor almost mutters, but then smiles. "Although what was I asking from you but wisdom? And wisdom I received, thank you. You are a great help."

A while of silence ensues, to allow emptying a tea cup, before an idea arrives.

"I wouldn't like you to depart Correspondently empty-handed, so let me give you something..." The Professor stands up and aims to the stairs again, stopping at the first step. "Would you like to come see my libraty with me as I look for it?" They offer, clawed hand held in invitation.