Perhaps it's not just the grounds of Collinwood that are filled with secret burials.
On the crawl at the bottom of CNN today was:
"Maine fisherman hauls in metal coffin from 2-year-old burial at sea; authorities return it to resting place."
I'm really not sure I understand it, but all I could think of was one of the Collins' bodies to be disposed of wasn't buried but thrown into the sea!!