I was able to finish the castle during the long weekend and start on the tree next to it:
There were a few differences between the photo and graph (presence or absence of the triangular "windows" on the roof below the dome; color of the "points" along the bottom of the roof on the right; pattern of stitches within the windows). Some I caught in time to make a decision about, some I didn't, but I'm not that concerned about precision. The only time I've ripped out any stitching on this piece is when my outlining of the leaves didn't meet up correctly.
One last picture (taken using my computer on a very overcast day; the photo at the top best shows the colors of the piece):
After I finish the tree, I'll probably move down. There are several animals, some plants/flowers, and at least one more tree to do. Then up to the top to do the sun and clouds.