Not sure this is the correct Daniel Williams, but I can send you a pdf of what I found if you give me your email address.

Daniel Williams served in the Civil War from 64-65 and was discharged due to a disability. It says his occupation was an engineer. He was put in a home for Disabled Volunteer Soldiers, and passed away 9-21-1914 from Senile Dementia.

Pension Certificate #:896.802

Grave appears to be: Sect 23, Row 10, Grave 4956
He was buried 9/23/14

There is name listed, and I dont know if it is a relative or someone at the hospital or funeral home: Mrs. John H. Tyler, Dennison, TX

This is also listed:
Rev James M. Payne Chaplain