Newton is one of the more solitary individuals I've studied, much more than Einstein or Liebniz or Feynman or Bohr. Newton had books of calculations unpublished

Newton is one of the more solitary individuals I've studied, much more than Einstein or Liebniz or Feynman or Bohr. Newton had books of calculations unpublished when Halley asked him about gravity and the moon. Would Einstein sit on books and books of info without thinking to publish it?