Charles, King Saul was deceived. That was not really Samuel, for a witch cannot call forth the righteous dead, but only a fallen angel.

Revelation: 16:14 For they are the spirits of devils, working miracles, which go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.

Do not be deceived yourself, Charles. It is not appointed for men to haunt the universe as disembodied spirits until the general resurrection on Judgment Day, when they shall be given new bodies.

Daniel 12:13 But go thou thy way till the end be: for thou shalt rest, and stand in thy lot at the end of the days.