Where is Dunksburg?

As you can see from the old map below, Dunksburg was shown to be entirely within Pettis County. But I'm quite sure it was 'officially' in Johnson County:

"Dunksburg is the only village in Grover (Johnson County) township. It is located on the Pettis county line on section 1. Doctor Dunkley opened a store here in 1858 and the village was named for him."*

* Source: "History of Johnson County, Missouri" by Ewing Cockrell, 1918.