Finding a Straight Line

I went out with a group of sketchers today to see what we could make of the old covered bridge up in the hills. My big realization was that I had to go back to Perspective 101: in spite of following a couple of tutorials on line, I could not make heads or tails of this complicated structure.  This wonderful bridge, like so many local sites I remember so clearly, is now obscured by healthy trees and shrubbery. There are angles upon angles, half of it in disrepair. Quite a challenge, and way more fun than Sudoku.