Info on the graves of France Jr, Josephine, and Margie, in St. Joseph Catholic Cemetery, River Grove (western suburb of Chicago), Illinois:

The info provided by the cemetery and its website is INCORRECT.

The correct location of the graves (two headstones, one for France Jr and one combined stone for Josephine and Margie):

https://maps.app.goo.gl/5jKG9kne1WXCqVhh9
(Google maps link)

The headstones are in the fifth row from the end (the first row runs along the low embankment; the yellow drain in the street is between the third and fourth rows). The headstones are about 35 yards (35 large paces) from the road (walking along the fifth row).