Why Harry stay with the Dursley's

[M. Barnett]

No: HPFGUIDX 19856

Someone wondered how the Weasley's knew where to find Harry.  I have 
a theory on this also ... 

It is quite possible that the Weasley's knew how and where to find 
Harry because Dumbledore allowed them to find Harry.  We all know, 
especially from the end of GoF, that Dumbledore trusts the Weasley's, 
so it would make sense that he would send them to "rescue" Harry from 
Privet Drive.