Apparently he was not a knight yet, instead introducing himself as the squire of the late Ser Derrick like he did to you, swearing to serve House Tully in his name. There was no comment on this though and Lord Tully took his oath the same way as he did every other before and after.
When all the knights had sworn their oaths, the young man called the room to order once more and then called for specific people to step up. This time, it was an eclectic mix of armsmen, knights and lords with no clear ordering, who all were asked to report about the happenings in the Riverlands.
Much of it you once again lacked the context for as raids on specific villages and towns you had never heard about were reported. The rivers were unsafe with the Ironborn having brought longboats and raiding everything that they could reach. There had been attacks all the way to Harroway's Town and bandits were roaming the countryside. The town of Fairmaket at the Blue Fork had been sacked entirely and now Ironborn were raiding the lands of House Bracken from the ruins.
Further north, things were even worse. The stories of abductions and vile magics being worked in Seagard were nothing new to you, but now the Ironborn apparently started to keep slaves by the hundreds in the city to shore up its defenses and work on improving the portage between Seagard and the Blue Fork.
The Twins had fallen too, which elicited gasps from most of the room and even surprised you. You had talked with people who had been there a few times and you knew that it was deemed very difficult to siege the double keep as one had to do so from both sides of the river.
However, Euron Greyjoy had allegedly used sorcery to badly damage one of those keeps and killing a number of people from the household, including the heir. Lord Frey surrendered after threats to have the keep razed entirely and his entire family clasped in irons to toil in the mines of the Iron Isles.