platform 9 3/4

[auntydle]

No: HPFGUIDX 133241

I know it's very late in the game to bring this up, but I only just 
discovered this website.  Why did Mrs. Weasley have to ask Ginny the 
number of the platfor in TSS?  This was how Harry knew he had to 
follow them to find the platform, but, with Ron being the fourth of 
her children to attend Hogwarts, why didn't she already know the 
number of the platform?  ...just wondering.


Auntydle