John Henry Pepper,
The true history of the ghost
(1890)
“ We now took out a patent for the new optical wonder, and having thus secured the invention from that piracy and robbery which too often dog the otherwise successful steps of inventors, causing nearly every patent to be called by the legal fraternity a damnosa hereditas, we looked about for a good place—hall or theatre—where the illusion could be started. None better could be thought of than the old Royal Polytechnic, where we offered at a moderate sum per week to produce it, paying for every stick, decoration, or engraved looking-glass ourselves. ”
