Sarah brought over an excellent old book called The Trees of California, by Willis Linn Jepson. It was published in 1909, and it had some amazing photos of the redwoods up north.
The caption reads: "Fig 15. REDWOOD (Sequoia sempervirens Endl.) Making the "undercut", which determines the direction of the fall, on a tree 16 feet in diameter. Humboldt woods." Photo: A.W. Ericson.Amazon sells Trees of California for $75, but you can read it for free at Google Books. Cool.