The Boy who wouldn't grow up

From the room at the top of this beautiful building with its decorative walls J M Barrie created Peter Pan and Wendy.  Perhaps as yet another attempt to win his mothers favour by being her favourite son who died as a child. 

James spent much of his childhood trying to be his older brother, dressing in his clothes and copying his whistle.  Their mother imagined the lost son was happy never having grown into a man, remaining a boy forever.

Many of you have asked where this building is, I have attached a google map to the address of 3 Robert St