Bobby, I believe there is a picture of your dad on page 344 of "Mickey Newbury Crystal & Stone, Second Edition." A passage from the book:
Mickey was head over heels in love with music at this point. “I got an old Gibson guitar and learned chords. There was this old boy, Julian Barnett that played in a popular Houston group, and he got me going on guitar. I played like him. He played chords like I never heard, with a lot of bass and real creative. He reached across two strings with one finger. I didn’t learn country guitar. He showed me how to use a drone but mostly I learned all the conventional stuff. I play real simple, mostly four chord stuff. I love open chords. It’s not blues or country. It’s just an extension of what I learned from Julian. I didn’t learn things off records because I couldn’t pick fast enough.” Julian would temporarily join The Embers, filling in for lead singer Don Angelo.