The tree I get to stare out the window at all day while I work has a fast fall. A full, luxurious head of green leaves last week. They turn a striking autumnal bright gold more or less overnight this past weekend. Then Tuesday’s and Wednesday’s cold, prolonged rain and gusting winds tear most of them off. The tree never seems to stop shedding. The lawn beneath it is now a golden-brown salad of dirty, sopping leaf-sludge. Did old Tunis plant this tree, back in 1891? The tree is tall, gaining on the building, almost to the top of the third floor’s roof spires. I am almost sure it is a European Ash. (Its scientific name sounds like a military motto — Fraxinus excelsior!) I know nothing about how fast trees grow. How tall would a 115-year-old ash be?