From A Wiki of Ice and Fire
|Title||Maester at Harrenhal|
|Book||A Feast for Crows (appears)|
A Feast for Crows
Maester Gulian accompanies the force sent from King's Landing to end the siege of Riverrun. He brings four cages full of ravens with him. He remains at Harrenhal after Ser Jaime Lannister leaves for Riverrun.