Samuel Thomas Donoho

I am Samuel Thomas Donoho's granddaughter. I would love to know when he came to Texas. The story has been passed down that his first wife, Angie Hendrix died. He and his daughter, Cloe Donoho (my mother) and his mother-in-law, Elizabeth Hendrix came to Texas in a covered wagon sometime after Angie died. I want to find Angie's grave and to know the date they arrived in Texas.