Here is William Blaikie's comment: “But what was it that really happened, and how did it come about? That the woman was able, even if she really had the aid of evil spirits, to bring Samuel into Saul’s presence we cannot believe. Nor could she believe it herself. If Samuel really appeared—and the narrative assumes that he did—it must have been by a direct miracle, God supernaturally clothing his spirit in something like its old form, and bringing him back to earth to speak to Saul. In judgment it seemed good to God to let Saul have his desire, and to give him a real interview with Samuel. ‘He gave him his request, but sent leanness to his soul.’ So far from having his fears allayed and his burden removed, Saul was made to see from Samuel’s communication that there was nothing but ruin before him; and he must have gone back to the painful duty of the morrow staggering under a load heavier than before.”—W. G. Blaikie, First Book of Samuel, pp. 409-410.