I did find a St Joseph Co marriage for Jacob Smith & Sarah Stuart. I did not find one for Jacob & Rathonise.
I found a Jacob buried in a Union Twnshp Cemetery died 1869 but wife with him was a Mary. Another in 1881 in Harris Twnshp wife Susannah. Another in 1852 in So Bend City Cem.
If you wish me to explore further, please reply to my home email: email@example.com
Irvin Morse SBAGS volunteer.