My William McD...T (have various spellings) born in Ireland c1835, had children born in Pennsylvania and moved to Iowa, where my gtgrandmother born. Have 1889 letter to "Bro and Niece" from "Your Sis and Aunt, Annie McCEARN, Coatsville, Penn."Have found this family in Coatsville, PA census 1880. I believe that the Sis would be a sister-in-law, and the McCearn is the brother to wife of William, [she had passed away around 1871]. Hope someone can help me. Sound familiar to anyone here?