One of the things this thread highlights for me is the history aspect of collecting. We're collecting little pieces of history.
This thread inspired me to look into the Pan American Exhibition, of which I knew next to nothing.

That led me to the assassination of President McKinley, which I also didn't know occurred at the Exhibition! So the for past couple of hours I'be been immersed in reading and researching.

So thanks to the OP, for apart from seeing the beautiful material posted in the thread, I've also learnt a lot!

Balf