Jane O'Grady in The Guardian writes that:
John M. Dolan says:
According to a possibly apocry phal tale, she once said to A. J. Ayer: “If you didn’t talk so quickly, people wouldn’t think you were so clever”; to which Ayer replied: “If you didn’t talk so slowly, people wouldn’t think you were so profound.”John Haldane writes:
[I don't know what to make of this, but it sounds interesting.]One of Anscombe's last pieces of philosophical writing was "Russell or Anselm?". PhilosophicalQuarterly, 1993, in which she defended the thesis that Anselm's argument of Proslogion 2 could be saved "from the stupidity of an Ontological Argument" by deletion of a comma. This rests on the claim that in "Si enim in solo intellectu est, potest cogitari esse et in re, quod maius est" the second (editorial) comma ought to be omitted; in which interpretation (as "if that than which nothing greater can be thought of exists only in the mind, something which is greater can be conceived to exist also in reality"), the argument does not treat existence as a property of objects and so does not fall foul of Kant's famous objection. Writing of her defence Anscombe remarked "[I have] thought harder about Anselm's argument than I did before. But I still think that I haven't thought hard enough. I don't know whether Anselm's argument is valid or invalid - only that it is a great deal more interesting than its common interpretation makes it."
Here's a bibliography, with other useful links: http://www.unav.es/filosofia/jmtorralba/anscombe_bibliography.htm