BROOKFIELD, Wis. (AP) _ The hometown of the mother of the ``Little House on the Prairie'' clan is finally marking her birthplace _ thanks to a chance discovery by an 8-year-old fan of the books.

Carly Wunderlich read everything written by Laura Ingalls Wilder, the 19th century pioneer whose stories about her youth as a Midwest settler were popularized in a television series starring Michael Landon.

Having exhausted the ``Little House'' stories, the 8-year-old turned to a Wilder biography and found a map that showed Wilder's mother, Caroline Quiner Ingalls, was born in Brookfield.

``We just sort of stumbled across it,'' said Pat Wunderlich, Carly's mother.

An excited Carly tracked down an early 1800s land map indicating the Quiners bought an 80-acre farm in 1839 where a condominium now sits, just a few blocks from the Wunderlichs' home.

Carly asked the local historical society to place a plaque at the birthplace, and even held a bake sale to help cover the $200 cost. It is to be dedicated this evening, with Carly as the No. 1 guest.