Re: Biddles Company of the Corps of Artillery
I think you family records have family lore mixed up. No confederate solider was issued land for fighting nor have I heard of that being done with Union soldiers either.
I Google searched "land grants Civil War" and found an old message fro 1999 with this response;
"Bob was correct in saying that no 'bounty land' type land grants were given to veterans of the Civil War.
However, perhaps the deed being discussed as a land grant was actually a special privilege-type homestead for Union Veterans.
"Union veterans of the Civil War received special homestead rights -- in 1870, the right to claim 160 acres within railroad grant areas (other homesteaders could claim only 80 acres); and in 1872, the right to deduct their length of Civil War service from the 5-year residency needed to prove the homestead." (page 231, The Source, lst edition)"
So look for "special homestead" paperwork for John Harris. It should name his heirs if he died in the war and he had to have been a Union soldier. There is a John Harris that was a Union and Artillery 1st Battery, Arkansas Light Artillery. (from NPS Civil War Soldiers and Sailors website).
So I am back to thinking the Biddle Artillery was for an ancestor who fought in War of 1812 and John M. Harris either enlisted in AR and most likely Confederate or moved form AR before the war and was enlisted from another state.
There is a database: "Official Records of Union and Confederate Armies 1861-1865; (National Archives Microfilm Publication M262, 128 rolls); National Archives, Washington, D.C." it is also on Ancestry and there are allot of John Harris listed, but one listing cites a John Harris I 38 as also being listed as John M Harris 2nd Ind Cav I 38. I 38 is a serial number cited at top of page.
Could your John M Harris moved to IN before the war? Do you have a burial place?
Where and when did wife die? Where are children in 1870 census?