Manson letters sent to Lincoln museum

[Steve]

But one would think that the material would be donated to a museum or archive at least tangentially related to the subject.

I can understand wanting to keep the Manson material away from "fans", but if the reporter wanted to do that than he should've considered the possibility, that after holding the material for several decades, a museum or archive that has no focus on the subject might be tempted to auction off the material if it desperately needed money.