Where did the Ghost of Christmas Past visit Scrooge?

The Ghost of Christmas Past visited Scrooge in his bedroom.

The curtains of his bed were drawn aside, I tell you, by a hand. Not the curtains at his feet, nor the curtains at his back, but those to which his face was addressed. The curtains of his bed were drawn aside; and Scrooge, starting up into a half-recumbent attitude, found himself face to face with the unearthly visitor who drew them: as close to it as I am now to you, and I am standing in the spirit at your elbow.