"Or wonder until driven mad
What would have happened if you had"

That's the way I remember the last two lines; they were almost my mantra when suffering from OCD. I think you've got the first line wrong somehow, but I can't remember what it was exactly.

The Magician's Nephew was quite obviously written after The Lion, the Witch and the Wardrobe. Towards the end of it Lewis remarks that the apple tree Digory planted in his back yard provided the wood (there's that word again) from which the wardrobe was built. Though I suppose that proves nothing; Tolkien went back and revised bits of the Hobbit so it would prefigure the Lord of the Rings so I suppose Lewis might have done the same thing in his work.

Anyway, "wood" has always meant a substance to me, and "woods" a place. I think Pooh et al. lived near the Hundred AKER Wood.