Once again switching gears. This time we're in Worthington, Iowa. Worthington is located in Dubuque County, so the local historical society falls under the county level.
The Dubuque County Historical Society was founded in 1950, growing out of a natural history museum founded in the 1870s. Today, the Society operates several museums and an archives. While the museums concentrate on local history, the archives focus on the history of the Mississippi River. Collections include photographs from the early 20th century, postcards of the Dubuque area, and biographies of prominent local individuals.
Since Worthington was not on the river, the collections of the Dubuque County Historical Society may not contain much on Worthington's locals. But, as always, it's worth a try. You never know how much of a relationship your ancestor may have had with Dubuque.