Case file · Remote viewing & psi research
Ossowiecki's sealed-envelope test in Warsaw
At the International Congress for Psychical Research in Warsaw in 1923, the clairvoyant Stefan Ossowiecki was said to have reproduced a drawing and text sealed in an envelope by the British researcher Eric Dingwall.
1923 CE · 52.24, 21.02 · status: disputed
The account
Ossowiecki, a chemical engineer, was tested many times in the 1920s and 1930s and later attempted 'psychometric' visions of prehistoric life from flint tools. He was killed in the Warsaw Uprising in 1944.
The sceptical view
Critics argue the envelope tests were not tightly controlled against sensory leakage or trickery, and that results were reported by sympathetic investigators.