This really isn't a hint or cheat. Basicly while sneaking repeatedly tap the sneaking button(R1). This will make you go faster then walking but still let you be silent. This also works in a bunch of other games that require sneaking.
Enjoy.

Sword struggle mission is very hard I just kept on killing people and the girl on the far left tower and then keep killing untill another one comes out kill her and then wait for another one to come out and shes got the wooden sword called rudis kill her to death and grab it and then go to the centre tower

If you want to beat him easily which is hard to do is kill the guard then press x+sqare the audience will throw in a large weapon thingie .You should kill him with a few blows.