* Mission Name: Oh Bother...
* Mission Area: Nassau
Talk to Vance first in central Nassau. Locate the targets with orange marks on the marketplace. Eavesdrop on them, hiding from behind covering areas, until they enter a small alley which ends the conversation. Go to the far end of the roof , utilize eagle vision, locate the target, use the trees above to reach the target, then air assassinate when him when you get the chance.
* Mission Name: The Other Brother
* Mission Area: Nassau
Follow Vance along the way first, then enter the green zone. Follow the targets while eavesdropping them. At the marketplace, get some cover behind the last stall on the left, then corner assassinate the thief that will approach the scene. Start following again. At some gallows, hide behind the western area, then corner assassinate the next thief. From here on out, just keep using covers and hiring dancers to stealthily eavesdrop, all while silently disposing of any unwanted thieves. Reaching the main street, activate eagle vision and locate the target, then immediately run up and kill him before the timer expires.
* Mission Name: Upton's Sorrow
* Mission Area: Nassau
At the bar fight, stop around 10 enemies while making your friend safe. After the bar fight, you escort your friend along Nassau, at which case hire any dancers that you will come across to make the job easier. Take out another wave of attacker along the path, then just follow the trail.
* Mission Name: Queen of Pirates, King of Fools
* Mission Area: Nassau
Locate the target first in the green zone. He is exactly situated at coordinates - 634,784. To reach the area, don't cross the bridge leading to it, instead enter the stalking area on the left. Head up the hill and hide behind the crates, peek out, then use eagle vision to see the target. Kill the first target, then quickly run up the second target and assassinate this one as well. Exit the restricted area and find cover until you get anonymous.
No Vance or Templar hut in Nassau. I'm now in Sequence 8, and I think I checked in 7 as well. Is it later in the story?