What are the chances of me finding pictures of my 3rd great grandfather?

Mary Lyn Robbins

My third great grandfather, Jesse Thomas was born in 1822 and died in 1870. I would love to have a picture of him to hang on my family tree wall. What is the best way for me to find a picture when no records that he is in seem to contain pictures? https://www.familysearch.org/tree/person/sources/LL32-DBC

Julia Szent-Györgyi

Chances are very, very good that no photograph was ever made of your ancestor.