Just found this thread and am very interested. My gg grandfather was Frederick T Moss brother of Edgar and William.
My research on this family corresponds closely to what has been posted here. I do have some documents concerning the family and maybe something to add.
Thomas Moss was christened on 12 Feb 1792 in Shipton Moyne, Gloucestershire to Thomas Moss and Mary Hillier. On 18 Dec 1817 The younger Thomas married Eliza Lea in Bristol (St. Ambrose), Gloucestershire. Eliza was born in Malmsbury, Wiltshire in 1795.
The couple had at least 7 children Ellen, Henry, Bertha, Frederick, William, Edgar and Rosa. There may have been another daughter named Martha.
The family minus Ellen and Bertha emigrated to New York State USA sometime in the 1840s. They lived in Moravia in Cayuga County by 1850.
During the American Civil War Edgar, William and Frederick enlisted in various units of the Union Army. After numerous campaigns Edgar and William were captured at Petersburg Virginia. Edgar died in Charleston, South Carolina and William at Andersonville Georgia. Frederick was captured at Hapers Ferry Virginia and was imprisoned at Camp Douglas Illinois He was later released and rejoined his unit but spent the rest of his life with bouts of dysentery. Frederick was also wounded in Virginia and suffered sun stroke on the second day at Gettysburg.
I do have more including a picture of Edgar from the book Carnival of Blood.
I know little about Eliza Lea's family but I continue looking.
Hope to hear from you.
Oh Frederick’s marriage in Ohio was his second unfortunately he neglected to divorce his first wife Eunice Huntley. Edgar and William did not marry.