Jefferson having so much knowledge about Emma leads me to believe that in a dream of hers, she has gone to Wonderland. Wonderland begins with a little girl dreaming or thinks she is dreaming and going to Wonderland. Henry is on Regina’s side I doubt if they did ever get a chance to talk he’d be very forthcoming to Jefferson. If Cora is the Queen of Hearts I’d doubt she will be forthcoming either. But a little girl having tea with little stuff animals and her friend who is seven years older may tell him. Yes, I will say it can be possible Emma and August travelled to Wonderland. Maybe he wrote the book. The map it looks like he is artistic. From his telescope, drawn out that map of the woods around his house, the one he showed Emma before he drugged her.