Found this in Carroll Co., IL. Query Forum. Hope it will help you to find more info:
Franklin Monroe Dixon married Mary Grace Schmidecamp(1861-1937) who lived in Savanna, Carroll County, Illinois. Children Known of are:
Charles Fredrick Dixon(1885-1918) m. Mary Ann Welsh (1885-1962) Nellie Grace Dixon(1889-1963) m. ? Bethke George Dixon(1894- ? ) Earl Alvin Dixon(1896- ? ) m. Maude Mishler(1903- ? ) Pearl Dixon(1896- ? ) m. ? Riddle Bessie Dixon(1898- ? ) m. ? Welsh Samuel Dixon(1902- ? )
Mary moved with children to Oelwein. Fayette, Iowa in early 1900s without Frank.
That's all I have at this time. Hope it helps you out