Oral tradition in Edward Casey's descendants say: "Two brothers were orphaned on the trip to America. Two families each adopted one of the boys. Years later, during the Civil War, upon hearing about someone in a nearby encampment that 'looked enough like him to be his brother', they met, recognized the similiarity in their appearance and their backgrounds and deduced they were actually brothers. One was named Casey and the other took the Casey name." [I found both Edward and his brother Michael in the 1860 censuses, and they were both named 'Casey', so that part of the story appears to be in error.]
The following is an account of Michael's early life given by his daughter, Sarah V. Casey, as she remembered him telling his story. He was born in New York City of immigrant parents from Ireland. Both parents died of a cholera epidemic leaving 3 boys, Tom, Edd and Mike. There may also have been a sister. The children were placed in a Catholic orphanage. He didn't know what happened to Tom but Edd was taken by a family from the south of Alabama, he thought. An aunt came from Ireland to take Mike back, but he jumped ship and swam back to the shore where he became a street urchin, selling papers and getting by as best he could. He made his way to Ohio where he worked on ships in the Ohio and Mississippi Rivers. When the civil war came along, Michael enlisted in the Ohio 77th Infantry. They insisted he had to have a middle name, so he chose James for his first, leaving Michael as the second. He fought in the battles of Elk Horn and Pea Ridge. At the close of the war he was down on the Rio Grande when a bunch of Confederate soldiers were brought in. A man asked Michael if he had a brother in the Confederacy, to which he replied that he had one, but that he had gone to someplace in the south. To which the man said, "Come, I think I may have found your brother." And it turned out to be Edward. When the war ended, James went home with Edd, marrying Edd's wife's sister. Both sisters died and both men remarried.
Edward had two other children not listed below. Felishus Casey was the first child born to Edward and 1st wife Nancy Darwin. He was 8 months old in the 1860 census in Brazos County but does not show in the 1870 census. I can find no other records of him. The first child of Edward and Sarah Elizabeth Douthet was Richard Pinkney Casey born July 9, 1872 and died sometime between the time the 1920 census was taken and the 1930 census was taken. His grandson did not know where he was buried and I have been unable to find a record of his death or burial.