Carl was born April 23, 1854, in Sweden, and died Feb. 15, 1935, in Henry County, Ill. According to a short biography of him in the three-volume History of Swedes in Illinois (published in 1908 and available on Google Book Search), he was a Mason, a Knight Templar, an Odd Fellow, a Knight of Pythias and a Mystic Shriner.
He also was a Major in the Patriarchs Miiltant, the uniformed branch of the Odd Fellows. Matthews wondered about his uniform in this photo and suggested it’s Patriarchs Militant attire.
She’s right. The three interlocking rings is the symbol for the Odd Fellows while the symbol on his hat identifies the specific group within the organization.