Bob Dylan has sold 6,000 personal items to the George Kaiser Family Foundation and the University of Tulsa for an estimated $20 million.
A large portion of the collection will be displayed at the Gilcrease Museum in Tulsa, with strict restriction of viewing by scholars and "Dylan experts".
The now 74 year-old has gifted original notebooks, a postcard from Barbra Streisand, handwritten lyrics to "Chimes of Freedom", "Dignity" and "Ballad of a Thin Man", and the collection also includes unseen footage of the musician performing at Toronto's Massey Hall in 1980, New York's Supper Club in 1993 and rehearsing for the Rolling Thunder Revue in 1975.
The collection would have been worth around $60 million, however since he low-balled the deal - he will be able to claim it as significant charitable donation for tax purposes.
Previously sold items of Dylan have been "Like a Rolling Stone" which sold for more than $2 million, and the guitar he played at 1965 Newport Folk Festival for nearly $1 million.
Dylan has kept quite reserved about his creative process when writing - however now researchers will have a greater source to tap into.