Large white marbles are associated with African Americans if I remember from
my Mississippi summer, where one or two were found. They were large "like
shooters" made from white rock.

Another site, so called GSA #4 had a lot of marbles in a drainage cistern in
what could be considered the middle of the Webb shipyards "ship furniture"
section of the block. The Webb Institute still exists today, on Long Island,
and scholarships for nautical architects are available. Unfortunately, it
built better ships for other governments that what we were willing to pay at
the Brooklyn Navy Yard. Its now mostly under the landfill of where "Batteries
Not Included" was filmed, by Steven Spielberg, 6th to 10th Street between
Avenue C and D in the lower east side of Manhattan.

George J. Myers, Jr.