Love this blog post from Ton Zijlstra about discovering a train ticket in an old book:

While the book is in excellent condition, not at all ‘well traveled’, it does make me wonder about its path through the world. From that 1991 train trip up the valley towards the St. Gotthard massif, to a bookshop in Galway, Ireland. And now to my bookshelves.

In 1999 when my wife and I were traveling in Europe, I left a book in a hostel in Italy. I wrote a note in it for the next reader. I still wonder where that book ended up.