Your right about travel Dedman. Check this out 3000 years ago from the Bronze Age in the UK. They've just opened up a dig to find beads from the Mediterranean and Indian areas. Plus a host of other things too. https://www.historicengland.org.uk/w...-life-revealed
I think it's a very safe bet that the 3,000 year old food found in the pots is well past it's use by date by now.