Earwarker's bio does not provide much more detail: https://books.google.com/books?id=RYcrLq2t-ncC&pg=PA3&lpg=PA3&dq=Dr+John+Hewitt+DD&source=bl&ots=tkg0JLXCY0&sig=johspAvze3RrjZpu0SMXky9vVIs&hl=en&sa=X&ved=0ahUKEwjjsvraqPPNAhWF4yYKHX2FDnEQ6AEIJDAB#v=onepage&q=Dr%20John%20Hewitt%20DD&f=false Doug Smith