Seems that Mort Dixon was born in 1892 so the 1908 date is not realistic.

He served in WWI doing shows for sevicemen.

Other credits include "Nagasaki", "I'm Looking Over a Four Leaf Clover" and "I Found a Million Dollar Baby in a Five and Ten Cent Store."

Unless it is a different song than I know, "Nagasaki" is a candidate for he worst song ever written.