Thanks for looking. I have Elias PRALL/PRAULL/PRAUL/PRAL in 1840; 1850; 1870; and 1880 in Washington Co., PA. The 1850 Census shows his wife, Rebecca, and daughter, Anne/Anna/Annie, who is my great-grandmother, born around 1847. I'm trying to find Elias and Rebecca in an earlier Census, if possible, and where they were in 1860.
1860 they can be found in:
(1860 U.S. Census)
Pennsylvania, Washington County, Canonsburg Borough
Series: M653 Roll: 1191 Page: 136 (looks like page 116 to me)
Dwelling #: 820
Family #: 821
Post Office: Canonsburg
I have the image.