Mystery Gravestone

Remember Riverstreet over hear Bulkhead, where Trader Tots and George Wilson Plumbing used to be? It's a big hole in the ground now, and earlier this year, someone found a *mystery gravestone.*

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To give you the setting, here's the big hole in the ground. I was standing on North Pacific Ave, looking across to River St.


It appears like when they dug the hole, they found this grave stone.


Here's the detail:


What's the story? Was someone buried there? Was this stone taken from Evergreen Cemetary around the corner? If so, why? Who was this man?