Below are articles about the ancient Native American artifacts unearthed at Caddy Park:
Caddy Park, Wollaston Beach, Quincy Massachusetts: Burial? Cenotaph? Cache? Or Offering?
By Thomas Mahlstedt and Margo Muhl Davis:
http://library.bridgew.edu/ exhibits/BMAS/pdf/MAS- v63n0102.pdf (scroll to page 11)
Student analyzes Native American artifacts found beneath Quincy playground
By Brian Fitzgerald:
https://www.bu.edu/bridge/ archive/2003/10-31/quincy.html