I don't know if the Peter Miller family in Vanderburgh Co., Ind. is connected to the Spencer Co., Ind. Miller family My Peter Miller/Mueller was in Greene Co., Indiana around 1859 then Vanderburgh Co.,Ind. I think his father was also a Peter Miller/Mueller that was also in Vanderburgh Co., Indiana but have no other info on him.Below is what I have for the my Peter Miller in Vanderburgh Co., Ind.
History of Vanderburgh County, by Iglehart
Peter Miller was born at Niederengelheim, Hesse, Germany, in 1828. And at the age of eighteen years came to the United States, settling at Evansville in an early day. He was active in business circles and in the work of the German Methodist church, and for years followed the trade of cabinetmaker.
1880 Vanderburgh Co., IndianaCensus
Miller,PeterW M 53Farm.H. DarmH. DarmH. Darm MargaretW F 44WifePenn.Germ.Germ. CarolineWF23DauILLHesse D.Penn. JohnWM20SonIndHesse DPenn EmmaWF16DauIndHesse DPenn LouisWM12SonIndHesse DPenn LilianWF7DauIndHesse DPenn