Meet with Warren and Prudence and head to Boston.
You need to head to the Homestead icon and speak with the man waiting there. The will tell you where doctor White can be found.
To end the mission, you need to protect the doctor from the attacking bandits. It's best to do it with quick combos.
In this mission, Prudence will ask you to goad the pigs into the pen. To do that, you will have to block the animals' path so that they run behind the fence. The mission will end as you goad all of them.
Get me a Doctor!
Meet with Prudence in the woods. She will ask you to get her a doctor as fast as possible. quickly get onto a horse and ride to the doctor.
As you get nearby his house, the man will hop onto the horse and follow you.
Don't get too far from him, as right behind the bridge you will have to turn left and inform the woman's husband.
As all three of you reach the target, the mission will end.
Speak with doctor White and head to Boston to meet with the courier.
He will be marked on the map with a Homestead icon.
After a short conversation, you will have to bribe all the boys distributing leaflets. They can be marked in the green circles marked on the map. Use Eagle Vision to see the children in shining gold.
After bribing the last of them, use Eagle Vision again to find the publisher of the leaflets. The man is walking along the main street, so finding him shouldn't be a problem. To end the mission, beat him or steal from him by holding down the interaction button.
Meet with the doctor at the shore and quickly run to Diana (marked on the map).
With the girl taking care of the diseased, you will have to help a couple wounded sailors yourself. Start off with the one in the south and move further north. Be quick, as you have a limited amount of time.
Afterwards return to the doctor to end the memory.