Go to left from the fountain, jump down to the platform laid lower on the right side. Stand at the brink of the abyss and run horizontally over the right wall. Under the vertical ledge take off to the left on the tower's stone window-sill. Clamber up it, head right behind then bend. Lower to relief under you sticking the dagger into. Take off to the right and run bit horizontally over the wall, then stick the blade in adjacent relief. Jump up and catch the rocky ledge above the bas-relief, climb it.
Farah will show up down below, in the distant part of the backyard. Unfortunately, the heap of baskets is piling up in front of her and she isn't able to pass so you are deciding to help her somehow. Go right behind the bend of tower, pass the corner and stand on the catwalk carefully. Jump straight ahead to the gap between two parallel walls. Bracing hard with limbs slide down. Jump on the Thrall's head below and kill him with speed kill. Deaden the remaining two also.
After the struggle look around. Localize the rectangular mechanism with the groove on one of walls. Run vertically over the wall under mechanism and stick the dagger into it. Falling down you will open the door to the left, so run fast to their direction (they are shutting quite fast, so you may help yourself using the Eye of Storm). Run across the door and head for left. Turn behind the bend to the left. There is closed door in front of you. Run vertically on it and catch the top brink. Clamber to the top, go through the recess of the courtyard with the Sand Gate.
Climb the catwalk and look around. Four enemies are strolling on the backyard - the one Sand Guard and three Thralls. Jump to the catwalk straight ahead, you may execute the speed kill attack on the enemy below you from here. You may choose the other victim also, use the relief to the right from you, jumping on it. Remember that the Sand Guard is most important, if you won't stop him before he sticks the blade into the magic pile, a small battle against considerable amount of strong Thralls awaits you (use the Eye of Storm in that case).
Come up to the Sand Gate despite the method of enemies' extermination after the struggle and stick the dagger into it - you will receive 150 sand credits. Now it is the moment of calm, so think about Farah. There is wicker basket in one of courtyard corners, nearby the stairs. Pulling it out from the wall you will cause next baskets to arrange so you may walk over them for the girl.
Tow the basket to the wall with the rectangular mechanism, opposite the place where you took it from. Clamber up it, run vertically over the wall with the mechanism and stick the dagger into it. Falling down you will open the passage to the right. Enter it and go right with the corridor. There is the ladder at the end of the corridor, on the right wall, clamber upwards. Exit to the floor and run straight. There is an abyss at the end of the corridor to the left. Stand above the precipice's brink, near the right wall.
Run horizontally over the right wall, after reaching the springboard take off to the opposite wall for the other springboard, and then jump from it on the floor behind the precipice. Farah will join you after a while. The dispute about the further direction will ensue between you and her. The huge tower being visible on the horizon where the Vizier resides attracts you. Farah wants to free people from captivity first. She will leave you with anger and will go to bowery direction.
After a while of reflecting you decide to go after Farah. Jump down to the platform below, a little bit further run up the stairs to the room with the fountain. Fill in liquids in the organism.