"I believe Booth & Lady checked into the Aquidneck House on April 5. The handwriting on the register is not Booth's. Mr. Hall found another J. W. Booth who lived in Boston and speculated the guy with lady was not our JWB."
However, this is not the way Art's book reads. In his book he accepts the fact that it's our JWB at the Aquidneck House in Newport.
You can see how the word "Boston" was written here.