Famous painting

Famous painting
and lemonade for her guests, but for her own part drank cold brook water from a cup fashioned out of birch bark. The cup leaked, and the water tasted of earth, as brook water is apt to do in spring; but Anne thought it more appropriate to the occasion than lemonade.
"Look do you see that poem?" she said suddenly, pointing.
"Where?" Jane and Diana stared, as if expecting to see Runic rhymes on the birch trees.
"There. . .down in the brook. . .that old green, mossy log with the water flowing over it in those smooth ripples that look as if they'd been combed, and that single shaft of sunshine falling right athwart it, far down into the pool. Oh, it's the most beautiful poem I ever saw."
"I should rather call it a picture," said Jane. "A poem is lines and verses."
"Oh dear me, no." Anne shook her head with its fluffy wild cherry coronal positively