"PARC was not at all secretive about its work. Its researchers published widely, and there was a regular flow of traffic between PARC and Stanford's computer science community. "
as opposed to a military intelligence company where all that would get you fired if not in prison.
I can't recall the female scientist's name, but I am certain have read an 'oral history' where this specific person, present when Apple people show up, angrily calls up Xerox HQ in east coast to protest and was told, over the phone, to "show them everything".