A few Elves who were among the first to cross the Anduin to make way for the main landing were captured by Orcs. If they are not rescued before the Malledhrim make their final assault upon Amon Angened, the prisoners will likely be killed.
'I fear that a few of our number have been captured by the Orcs, pathfinders who came across the river in silence before our attack to mark the landing spots and eliminate the Enemy's sentries.
'Most of them have returned since we began our assault in earnest, but a few have not, nor have we seen any sign of their bodies, which the Orcs would have left to rot had they been slain. Thus I must believe that they yet live and are held captive nearby...most likely in the central fortification upon Amon Angened, as they have not had time to move prisoners to Dol Guldur.
'However, once we assault that fortress in earnest, they would most certainly kill any prisoners held there. If you could manage to get them out before then, the Malledhrim would be in your debt.'
Elvish prisoners are being held in the Orc-fortress upon Amon Angened, south-east of Echad Sirion.
Agorin has asked you to mount the rescue of Elvish prisoners from their Orc-captors.
Agorin is at Echad Sirion, on the eastern bank of the Anduin.
You should return to Agorin with news of your success.