The statement he wrote on the Oberlin MS indicates that he for a time thought it was the MS described by his witnesses. At some point after that, he evidently changed his mind.
The statement only indicates that MSCC is the "writings of Solomon Spalding." It offers no indication that Hurlbut ever believed it was the MS described by his witnesses. A cursory reading shows that it does not contain the correct names, which was recognized as the key factor. In fact, that statement harmonizes with the Hurlbut statement reported by Dickinson we've been discussing.
Are you suggesting that Hurlbut's "I'm going to take Mormonism down" lectures included exhibitions of MSCC? Was any Spalding ms displayed to the public during those meetings?
What do you make of Brigg's and Dowen's statements?