Trivia: Tom Hanks is the first actor to play Walt Disney in a mainstream feature film.
Trivia: In the final scene from Walt Disney's office when P.L. Travers has arrived for the premiere you can spot a map of Florida with a marked area of where today's Walt Disney World is located. Walt Disney was indeed planning WDW in 1961 and it was in the early stages of development on the drawing board. Ultimately, Walt died before the new park opened. (01:50:40)
Chosen answer: It seems P. L. Travers was, in fact, right-handed. With just a bit of research, I found this YouTube video: http://www.youtube.com/watch?v=xeiEumLxTcM. At time reference 4:05, archive video shows Ms. Travers in her garden, holding a basket hooked on her left arm, and making clippings with a scissors in her right hand. Feeling convinced, I stopped, though I suspect further research (it's a six part biography) would yield other examples of P. L. Travers engaged in right-handed activities.
Michael Albert
Only problem with the assumption that travers was right-handed because she trimmed plants with her right hand is that there were no (to my knowledge) scissors for lefties. I was born in 1955 and I am a lefty who cuts right-handed, wear my watch on my left wrist, and made other adaptations due to the fact that left-handers were ignored, and travers was born over 50 years earlier.