Tolkien and the origin of Treebeard

[Einarr]

From The Treason of Isengard:

Of 'Giant Treebeard' there have been many mentions in the outlines scattered through the early texts of The Lord of the Rings, but there was nothing in any of them to prepare for the reality when he should finally appear. My father said years later (Letters no. 180, 14 January 1956):

I have long ceased to invent... : I wait till I seem to know what really happened. Or till it writes itself. Thus, though I knew for years that Frodo would run into a tree-adventure somewhere far down the Great River, I have no recollection of inventing Ents. I came at last to the point, and wrote the 'Treebeard' chapter without and recollection of my previous thought: just as it now is.

Just a little thing I found while reading some of my Tolkien manuscripts. Hope you all find it interesting!