Convinced by your argument with Legolas, the woman Aithil has welcomed you as a supporter of the Heirs of Castamir.
'I do not begrudge Elessar his choice of wife! Were he not King, he could marry anyone he wished, and he would have my blessing. But if he is to be King, he should put the needs of Gondor ahead of his heart's call. If Gondor is to have a Queen, she should be a woman of Gondor. Does he not know the history of his own kingdom? Eldacar married a north-woman and caused much bloodshed. Does Elessar desire another Kin-strife?
'The scribes named Castamir \qthe Usurper\q for trying to restore Gondor, and he perished for it. But even today there are some who believe in that for which he stood. If you join with them, you may be well-rewarded, and see the return of a King who prizes what Gondor should be.
'One of the beacons of Gondor remains lit, and it casts Castamir's shadow long and far. If you are a friend to those who wish to see it remain so, you will agree with us. We must act in the shadows, for now, and keep down our voices; you never know who might be watching us.'
The woman Aithil, south-east of the Pelargir Armoury, is convinced that you agree with the Heirs of Castamir. You should ensure she continues to believe it.
Sirgon's Manor is located to the north of the Pelargir Armoury, in King's Gondor.
Faltharan told you that Amon Anglebed has been kept burning, and may be the beacon about which the skulking woman spoke.
A man stands by the beacon. Perhaps he is the contact about whom you were told, and if you agree with him he will reveal himself.