The 26 volumes was correctly rejected as hearsay. It contains testimonies and statements of witnesses which can only be admitted by calling the witnesses themselves and allowing the opposing party to cross-examine them. Although at a preliminary inquiry the threshold for committal to stand trial is much less than is required for a conviction (the test is essentially whether there is some evidence on which a properly instructed jury could convict) the same rules of evidence that apply at a trial are followed.
Thanks, that explains it.
