I drew this at night, (it has a light right under it.)
I remember standing at the base of this tree after unsuccessfully trying to climb up the trunk. Just then my friend John Deng walked by and gave me a boost. It was a Saturday morning a year and a half ago.
I still find it difficult to draw the left side of trees. I remember Oliver Sacks writing about people with brain damage who couldn't eat the left side of a plate of food, but I think my problem is just that my hand is over the trunk when I draw the left side.