I don't see where, in this discussion, it's been established that these
were CBC recordings. Yes, there are items that walk out of institutions and
ought to be given back, but these could be private tapes that have nothing
to do with CBC, or if they were done by CBC these could be copies that were
made for, and given to, Gould.
The question of the tapes' market value is one thing. Whether the musical
and sonic values add up to something that could or should be released to
the public, that's a different question.