The claim that the accordion feat was performed by Home using a small harmonica was originally suggested by J. M. Robertson in 1891. The psychical researcher Eric Dingwall who catalogued Home's collection on its arrival at the SPR did not record the presence of the mouth organs, and Lamont speculates that it is unlikely Dingwall would have missed these or not made them public. The accordion in the SPR collection is not the actual one Home used. They display a duplicate.