Lexington
Concord
Posts by minute marker are at q-clock.com
Also a chart for what marker it currently is and what mirrors need to be checked as well.
News unlocks the map
Watch for news that fits with the past drops.
Chart them on a circular flow diagram (if you are a clockfag)
Lexington
Concord
Year of the Tiger
1/19 Popcorn Day
4/19 Patriot's Day
9/11 Patriot Day
Also for that ClockFags work check the minute marker pointed to by the pen (Follow the Pen)