We heard how even though Paul Revere was not a member of the church, he had been a bell-ringer there in his youth and the church sexton, Robert Newman, who of course had keys to the church, was a fellow Sons of Liberty. Newman was the one who climbed the tower and put the two lanterns there. He barely escaped because the British troops had also seen the message and were at the church door before he had gotten down the stairs. Newman escaped through a window near the organ.
General Gage was a parishioner of Christ Church and the majority of parishioners were loyalists. The current rector speculated that if Christ Church had had a proper interim, without all the intrigue of the curate (if I remember his story correctly, they wouldn't let him have the keys), entrance to the church might have been stopped and the Redcoats might have taken Lexington and Concord, and the notice posted at Old North today near a donation box which says "If it weren't for Old North Church, you might be making donations in pound notes" would be true.
Happy Fourth of July!