Shirley,
Sorry I don't know anymore about William. I did find this obit for your Priscilla:

The Waldron Advance
3 March 1905

The wife of Judge Edmond Yandelll, who resides a few miles east of town, died one day last week. The Yandell family is one of the most highly respected ones in Scott Co. and the death of this good woman is a sad blow to the people of this community in which she lived. She leaves several children and othe relatives to mourn her loss, and the Advance joins their many sympathizers in this sad bereavement.

I will send you the marker photos.