When Professor Dumbledore turned up at Privet Drive and Professor McGonagall ask were they were there Professor Dumbledore told Petunia Vernon and Dudley Dursley are the only family Harry has left . Now we know James Potter's Parents are both dead has they were old when they had James but Lily's Mum and Dad most be dead too . We know Professor McGonagall has been watching the Dursley all day as she was there when Vernon left for work that morning and still comes home Professor McGonagall has seen Dudley had kicked his Mother screaming for sweets.
