Isaac was born about 1844. He was the son of Richard Yeager and Jane Johnson. He passed away in 1905.
When Isaac was seven years old, his father sold Isaac, his siblings, and his mother into slavery. Isaac never saw his family again.
At the beginning of the Civil War, Isaac escaped and joined a Union Army camp where he was engaged as a cook. He later went to Detroit and became a soldier in Company A, 102nd Division U.S. Colored Troops.
After the war he moved to Canada and became a highly-skilled stone mason. He was the contractor that built several churches and town halls in eastern Ontario and northern New York. Among those are the old Waddington Town Hall in Waddington, St. Lawrence County, New York, and the Catholic Church at Churubusco in Clinton County, New York. Isaac also built a stone-arch bridge near Chamberlain Corners, and likely built the similar stone-arch bridges at Madrid and Louisville, all in St. Lawrence County. (The bridge at Louisville was replaced with a modern bridge several years ago.)
In 1901, after becoming disabled, Isaac wrote the book, Slavery Days in Old Kentucky. A True Story of a Father Who Sold His Wife and Four Children. By One of the Children. - printed by Republican & Journal Print, Ogdensburg, New York. Reprints of this book have been available for many years.
Johnson, Isaac. Slavery Days in Old Kentucky. Ogdensburg, New York: Republican & Journal Co. Print, 1901 (reprint by Friends of the Owen D. Young Library and the St. Lawrence County Historical Association, Canton, New York, 1994, with introduction by Cornel J. Reinhart)
1860 census (slave schedule): (probable) 16-year-old male listed by John Mattingly - District 1, Nelson County, Kentucky
U.S., Civil War Soldiers, 1861-1865, at Ancestry.com
1871 census: (possible) Isaac Johnson - Raleigh, Kent, Ontario
Ontario, Canada, Marriages, 1826-1938, at Ancestry.com
Marriage announcement in Dundas County Herald and St. Lawrence Reporter, Morrisburg, Ontario, Thursday, 30 December 1875, page 2, column 8 - https://archive.sdgcounties.ca/uploads/r/dundas-county-archives/b/2/2/b226131d1e45ff3c93400c512a9d629845421a91ae4e2491035636ad66fe6988/1875-12-30.pdf
1881 census: Isac Johnston - Mountain, Dundas, Ontario
Civil War Pension Index
1890 census - veterans schedule: Isaac Johnson - Waddington, St. Lawrence, New York
1905 state census: Isaac Johnson - Ward 2, Ogdensburg, St. Lawrence, New York
New York State Death Index
New York, U.S., Veteran Burial Cards, 1861-1898, at Ancestry.com
Burial at Ogdensburgh Cemetery, Oswegatchie, St. Lawrence, New York - https://www.findagrave.com/memorial/27409199/isaac-johnson
Obituary in The Ogdensburg Journal, Ogdensburg, New York, Tuesday, 5 December 1905, page 4, column 4 - http://nyshistoricnewspapers.org/lccn/sn85054113/1905-12-05/ed-1/seq-4/
https://www.adirondackalmanack.com/2018/12/isaac-johnson-former-slave-master-mason.html - article by Richard White
https://www.wwnytv.com/2023/02/24/black-history-slave-sought-after-waddington-stone-cutter/ - article and newscast by Emily Griffin