von Wright Materials
The von Wright Materials is the part of von Wright own literary estate kept at WWA.
The von Wright papers

The von Wright-part of WWA contains materials such as drafts of published works, lecture notes and correspondence. There are also some unpublished talks and manuscripts. The total amount of correspondence is almost 10.000 letters. It includes letters relating to von Wright's activities as one of Wittgenstein's literary executors, correspondence related to various organizations and correspondence with publishers. 

The cataloguing of the von Wright Materials is a work in progress, but a specification of the contents of the collection is available from WWA on a research related request (hy-wwa at helsinki.fi).