Written by pioneer psychiatrist Henry Maudsley, this 1887 publication presents a largely sceptical account of nineteenth-century spiritual encounters and experiments with the supernatural. Dividing his work into three parts, Maudsley suggests that such beliefs stem from errors in human observation, overactive imaginations, and delusions caused by mental illness.

First published in 1886, this largely sceptical account of Victorian spiritualist interests attempts to find natural explanations for supernatural occurrences.