For us it was when we could no longer find the place in which to return the journal. It may come to grow on you after a time, as it has my companion, he seemed rather confused in the beginning when I wrote in Sindarin, so I now try to keep most of my writings using the Westron letterings.
It is nice to find out that someone else has something other than a key. Thought we were the odd ones out with the amulet.