I actually started a similar thread on CAF regarding Saul and the witch of Endor.
Here's what I find interesting:
Saul had issued a decree of slaughtering those with familiar spirits, etc. These familiar spirits are able to relay or foretell information.
If this conjured spirit wasn't Samuel and just a familiar spirit, why didn't the familiar spirit warn the witch that Saul would soon approach her in disguise?
Remember these witches were being persecuted, and it would only seem logical that if this was a familiar spirit, it would have warned the witch of impending danger, mainly Saul's soon arrival.
Samuel 28
8)
And Saul disguised himself, and put on other raiment, and he went, and two men with him, and they
came to the woman by night: and he said, I pray thee, divine unto me by the familiar spirit, and bring me him up, whom I shall name unto thee.
9) And the woman said unto him, Behold,
thou knowest what Saul hath done, how he hath
cut off those that have familiar spirits, and the wizards, out of the land: wherefore then layest thou a snare for my life, to cause me to die?