Assassin's Creed II/Courier assignments

Casanova
You'll have four minutes to deliver two letters, one to the north and one to the southeast. Head up the street and through the arch to the north, then go up the stairs and climb the side of the building you come to. The entrance to the courtyard is guarded, but you'll find a letter down to the lady you want on the eastern roof. You have to be anonymous to give her the letter, so it's quicker to just ignore the guys guarding her. Climb back up the way you came and head to the next objective in the south. The next woman is on a rooftop balcony, guarded by men on either side. Climb up the building from below one of them and take him out when he turns his back, then hop over the railing to the woman and deliver the letter. You don't have to take out both guards, but you can if you want. One of the guards likes to jump up on the roof and check on the other one, which you can use to your advantage, either to deliver the message while he's up on the roof or to sneak up behind him while he's investigating his fallen comrade.
 * Memory start: Talk to the guy in fancy clothes out in the street in front of your house in Florence.
 * Reward: 100ƒ