It’s called Linden Hall. All grand estates belonging to great men must have a name, and Larry Brown, former coach of the 76ers, is a great man (Allen Iverson would agree). The seven-bedroom Colonial residence was expanded recently, and it’s now a rather capacious 11,000 square feet or so, thank you very much. Of course it has all that it should, being a luxury estate. But then, it also has some serious surprises.