While on the way home, made a short stop to observe the Woburn Peregrine Falcons.  One of the regular peregrine watchers, Jill, was just departing.  She had a nice chance to watch the adult female as well as the 2016 hatch year fledgling.  They had both departed, prompting Jill to do the same.  Minutes later, storming in from the south, was the adult female.  She flew directly onto Pinnacle Rock, well above the nest ledge, and remained in place as the late day light was fading away.