From Copyright Point of view this is quite straight forward, CoC has copyright protection 70 years following Rays death. If there is no Family alive that could have inherited the rights, then it is in hands of some copyright organisation. Publisher might also have bought the full rights to this literature work at some point, their right would be exactly the same, 70 years from Rays death. The 70 year period starts from 1st of January 2011.
CP