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Magnus's apartment was a walk-up, in a building in an industrial neighborhood that has been converted to an apartment building. The building's interior was poorly maintained, with its dirty and rickety staircases.
- Magnus may have lived in his apartment in Brooklyn for at least half a century, unless he lived in a different apartment in the 1950s in Saving Raphael Santiago.
- In The Fall of the Hotel Dumort and The Last Stand of the New York Institute, his apartment was written as being near Sixth Avenue and Christopher Street in the West Village neighborhood of Manhattan.