Have you ever briefly looked something up and found yourself interested to the point of distraction, passing into some realm that, once entered, is extremely hard to get out of? If so, you've come to the right place.  In episode two of The Rabbit Hole Detectives, Cat, Richard and Charles investigate three more subjects - which invariably lead into myriad different stories which head off down all sorts of weird and wonderful pathways - as they chase the provenance of historical objects both real and metaphorical.