Im a great-great granddaughter of Joseph Butler Langley. I don't have all of my info in front of me but Im positive your Miles Ledford is in the same family...I think he may have been a brother to my Joseph and their father was probably also a Miles. Id have to go thru a ton of papers to find it. But, they all lived in Clark County, Arkansas. There is a lot of documentation on the Langleys in Clark County. Census records, land records, burials, etc. They were a large family. My Joseph, also known as JB, himself had about 14 children with three different wives. One of Joseph's sons is also named Miles. There is also an Isom..also spelled Isham..and an Isom Paul Langley. Look in the census records for Clark County in the 1850, 1860 and 1870 census and later. My Joseph died in 1881,he was born around 1823. The Langleys came to Arkansas from GA/NC and some of them who were here ended up in Louisiana and Texas. I live here in Arkansas, there are lots of Langley descendents. Research Clark County and especially the towns of Arkadelphia and Gurdon and surrounding areas. You will probably find what you are looking for, and then some.