Grindelwald taught Tom about making Horcruxes

[Geoff Bannister]

No: HPFGUIDX 139650

--- In HPforGrownups at yahoogroups.com, "M.Clifford" <Aisbelmon at h...> 
wrote:

Valky:
> Leaving us with only one thing left to find - What made Grindelwald
> immortal. We only have canon on one method of pursuing immortality so
> let's call it that, Horcruxes. 
 
Geoff:
Where are we told that Grindelwald was immortal? And, if so, where is 
the dear chap now?

IIRC we are told only that Dumbledore defeated him in 1945.