How Sundials Work Part: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Part 19. Walls declined from East / West. Part: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20