Make your way into the northern district of Boston to find Paul Revere's house. After talking to him, he'll take you up the river to begin his famous ride. Climb aboard the horse with Revere and begin the ride. During the ride, he can direct you to where you need to go if you hit the LB/L2 button. While on horse, he'll actually speak his directions as well as point but when you get close to your destination and need to visit a house on foot, he'll only point for fear of alerting the Red Coats.
From where you start out, ride straight ahead and when you hit the path, take a left. You'll ride this path until you come to a major road. At this road, you'll see a group of Red Coats marching along. Wait for them to pass and slip across the road behind them. Continue to take directions from Mr. Revere until you come to a town and he says that you'll have to continue on foot.
At this point, you'll have to enter the town without alerting the guards. Paul Revere has no stealth skills so make sure you never cross the line of sight of the Red Coats, even if you are stalking. Instead, circle around behind them and wait for them to march across the town. As they do so, follow along behind them and continue to ask Paul where you are going. The building you are looking for is likely the building with a bunch of clothes lines in the front yard but be sure to ask Paul in case the house changes randomly. Knock on the door to alert the people in this village.
Get back on the horse and continue riding. Follow the directions again to lead to another town. Enter the town and when Paul says to dismount, you'll probably already be pretty close to the house you are looking for. The house will be on the east side of the large green circle but remember to double check with Paul before opening the door.
Get back on the horse and keep riding. You'll be headed for another town. When you get to the river, don't try to cross the water until you find the bridge because it is pretty deep and it is possible to get partially stuck. When you get to the town, find the house and talk to the people inside. Turns out that this house is actually a trap. They'll chase you out of town and you'll need to escape for your next destination and get there within the allotted time. To do this, keep riding along the road headed east until you can go around the stream/pond. From here, turn north and follow Paul's directions until you find the house you are looking for. Knock on the door before the timer runs out to meet that constraint.
The last leg of the journey is pretty simple so head back to the road and follow the markers to get to Lexington. You'll find the Sons of Liberty gathered at Hancock's house in town.
