[FOM] A quotation from Fraenkel

[T.Forster at dpmms.cam.ac.uk]

I have been reviewing a manuscript for a publisher, and it contains the 
following observation, which the author attributes to Fraenkel

     ``[the axiom scheme of foundation] is to be discarded once it 
       turns out that it impedes significant mathematical research..''

  Now i *could* chase up the author but something tells me that breaching 
anonymity in that manner would not be cool.  I have my own copy of Fraenkel 
*Einleiting in die Mengenlehre* but i can't find it anywhere in there.  Can 
anyone cite a source..?

      thanks

        tf