What are four examples where materials/data were consciously destroyed or omitted (hint: Watson, Freud, Jung, Kohler)?

Watson

- At the age of 80, he systematically burned his letters, manuscripts, and research notes, destroying everything unpublished

Freud

- made his biographer omit/minimize his use of cocaine

- he depicted himself has a martyr to his psychoanalytical cause

Jung

- letters were selected and edited in such a way as to present a favorable impression of Jung, leaving out unflattering material

Kohler

- a scholar who catalogues his papers was too much of an admirer, and he restricted selected information to enhance Kohler's image

What are instances of materials/data that surfaced much later than the actual events (hint: Hooke, Ebbinghaus, Fechner, Darwin, Sabina Spielrein)?

Hooke

- official papers from the Royal Society meetings recorded by Hooke in 1661 to 1682 were found in 2006

Ebbinghaus

- papers of Ebbinghaus were found 75 years after his death

Fechner

- 10 boxes that contained handwritten diaries of Fechner were discovered in 1983. The data covered the period from 1828 to 1879, important years in psychology

Darwin

- new material was found in 1990, which included notebooks and personal letters that early biographers didn't encounter

Descartes

- italian mathematician stole more than 70 letters from Descartes, and one of those letters was found in 2010