One Green Bottle

So son went to help my 91 year old Father by digging over the borders whilst I took Mama out for lunch and Pops went to his Rotary lunch ; he raced through the gardening and rang me ( we were in M&S having a bra fitting - quite a palaver) to say that as he’d finished he’d been wading in the river at the bottom of the garden and had found All Manner of Interesting Things !
He found bones ( he thinks they are human)
Lots of shards of pottery
Freshwater shellfish ( unidentified)
I love this bottle and am loathe to clean it up as the colours are gorgeous.