How did WW learn LV evaporated?

[kvapost]

No: HPFGUIDX 166349

Hi everyone,
I couldn't find anything in archives and do not remember from the 
PS/SS...please bear with me and help me out if you can.

My question is - how did the WW find out about LV's evaporation? I 
didn't think there were witnesses willing to share this with the Daily 
Prophet? Or were they? 

(ducks and expects to  be flogged for joining the list without 
learning HP books by heart) :)

Kvapost, the grateful list reader.