She married George Whinnery in 1851, Lee County, Iowa. According to his bio, she was born in "Clonis"(Clones?), Ireland in 1831. I imagine she may've come to the US in the 1840's. I don't know for sure. I found census information for a William Pratt aged 40 with Andrew and Mary ages 20 and 19 for Nauvoo, Hancock, Ill 1850. An "Ireland, Births and Baptisms" record shows Mary born to William and Eliza Thompson Pratt in Clones, Monaghan, Ireland in Oct. 1831. Did Mary come to the US with her father, William and brothers Andrew and George? I'd love to know the name of the ship they were on and the year.