Historical research sometimes brings up that which was once cast down a dark hole, such as the British civil service’s 1963 inquiry into toilet paper quality, and the complaint that triggered the investigation. A report in the January 4, 2005 issue of The Daily Telegraph seems to have unfurled this once tightly-wrapped secret. The report includes a possibly-incriminating photograph.
(Thanks to investigator Charles Bergquist for bringing this to our attention.)