A sapience memorial as he is leaving...

... not a statue, but:

1) A NPC with a fun quest, like, run from A to B in less than XX minutes (Bree to Isengard, or Dol Amroth to Celondim, .... ...something long) - permanent or part of a festival.

2) Or if too stupid, a lake, a river, a mountain, or a NPC looking like sapience without the quest.