Step 1: Recalling the Text:
Charley's reaction shifts from active searching to a more patient, hopeful preparation once he gains evidence the third level is real.
Step 2: Explaining His Reaction:
His repeated failed searches turn into a long-term strategy of quietly accumulating period-correct money, a sign he has not given up on eventually finding his own way to the past.
Final Answer:
After failing repeatedly to find the third level again, Charley turns to a stamp and coin dealer to gather old-dated money, choosing patient preparation over further frantic searching, in hope of one day making his own journey back to 1894.