Hagrid and non-verbal spells

[stevemac]

No: HPFGUIDX 151545

Sandy:
> He may have had only three years of formal training at Hogwarts,  
> but by the time Hagrid took Harry his letter Hagrid had *been* at 
> Hogwarts for 50 years. I would think that over all those years 
> Hagrid would have picked up a thing or two. Also, perhaps
> Dumbledore gave Hagrid some private tutoring?

SteveMac:
We've also seen that Hagrid has full access to the school and has  
looked up things in the library if he needs information... it might  
have been that he needed info on how to perform non-verbal magic and  
taught himself.