Grandpa Jack is how we knew him but we lived on the west coast he on the east and he did not like to fly, did it once to see us and never again after that. I have fond memories of him sending a big package every Christmas season wrapped with brown paper and a white twine tied as well. I have original copies of Witches & War-Whoops and Spaceway Ballads. His works are archived at the Smithsonian and I'm told in Montclair at the NJ Art Museum but have not confirmed that. I still live on the west side of the country but some day will take up the challange of going east and doing lots of research.
Bill