Apart from establishing a new post, there's not much to say. The dwarves who skedaddled make their apologies, the kobald bodies continue to be policed. The dragon closes itself in, so that the three entrances become filled with frosted ice. The outside surface of this ice begins to melt - the dragon isn't able to keep its den closed all the time, as it is warm enough in the storeroom to melt whatever the dragon creates. But the ice should last for a few hours.
It is gobbling kobalds and drinking beer - though you can only hear it. Thankfully, its not something you can see.
There's nothing to describe now except a door. It is 7 feet tall and 4 feet wide. It looks heavy; there's no evident lock, but the door may be barricaded on the inside. If so, the dwarves should be able to tear it apart with their picks in about five to ten minutes, depending on how much water is in the wood.
What do you wish to do?