Perfect Duluth Day

Mystery Photo #140: Fourth of July Gals

All that is known about this photo is the information written on the back. “4th July Celebration in Duluth” gives us a date, along with the vague understanding that it’s from sometime in the early half of the 20th century. And we get the first names of the girls: Bonita (?), Rosemary, Helen, Jerry and Kathryn.

Can anyone figure out more?