Blackstone was a contemporary of Houdini's and a true rival (and irritant). After the deaths of Houdini and Thurston, Blackstone reigned for many years as the most famous name in magic.
Below is the flier for the Blackstone unit (#15). If you're interested, act fast. Even less magical apartments in L.A. disappear fast.
Thanks to Lisa Cousins.
UPDATE: The unit has been rented.