Come up near brink of the abyss right from the fountain. Stand under the right wall, run horizontally over the wall and bounce off the springboard to the left. You will land on the terrace with the Archer and the Guard. Eliminate enemies to death, enter onto platform on the left, stand near the wall and run over it horizontally. After running over the shutter bounce off it to the terrace on right where the Archer is standing. Kill him.
Come up to the rail left from the shut door. Sling from the exterior and take off to the balcony vis-a-vis. Deaden the guard standing with his back to you after landing, you are able to use the speed kill attack. Jump down left to the lower level and come up to the wall with relieves. Stand under first one on the right-hand side. Run vertically over the wall sticking the dagger into relief. Bounce off it to the left, run horizontally over the wall and stick the blade into the neighbor one. Then repeat the maneuver for the third time hooking with the knife the last bas-relief on the left.
Hanging on the relief take off to the left, run horizontally over the wall and at the height of the chain bounce off to its direction. Slide down, jump down to the ground. Eliminate the guard, climb the catwalk close by and jump right ahead on the next chain (right from the trail of the Sand Gate). Go down with it, watch out guards under you. Switch on the speed kill mode when one of guards will walk under you, then take care of his comrade.
After the struggle lower from the rail and jump down to the backyard, kill the Sand Guard (speed kill). Stick the dagger into the Sand Gate, and you will receive the power of Sands of Time - Eye of the Storm. Return to the balcony which you jumped down moment ago and run with the corridor to the left.
Behind the corridor bend turn left, run up the stairs. Head for their top and then again to the left. Three enemies will attack you here: the Archer and two Guards. Eliminate the Archer to death first (so he can't shoot you with arrows), then take care of the remaining two. After the skirmish look for opening in the wall to the left, where you are able to see backyard well. There is decorative tile in the wall opposite to the opening. Run vertically over the wall and push in the tile, the gate will open on the other side of the square.
Jump down from the mezzanine to the courtyard and run as quick as possible to the direction of the door. The gate is shutting fast so take advantage of the Power of Sands of Time obtained a while ago for slowing down the time. You will reach the entrance thanks to it without any problem. Behind the door go a little bit further, then roll under boards enclosing the passage. Turn to the left, at the end of the corridor near the left wall the fountain is located. Taste water.