In all honesty, Merlin should have known better. No one knew better than him the regularity with which threats towards Arthur and Camelot appeared. He really should have predicted what would happen that week, when two of Camelot's fiercest defenders found themselves otherwise engaged.
It all started when a farmer from one of the outlying villages appeared before the court to ask for aid. There was a sickness sweeping through the village – named Willowcombe - and although it wasn't fatal it was keeping many of the villagers from their daily work. As it was nearing harvest time, this didn't bode well for the future.
Arthur, naturally, agreed to provide whatever help was necessary practically before the man had finished speaking. The council was convened and discussions as to the best course of action began.
It was decided early on that Gaius himself would have to travel to Willowcombe. No one else could possibly have the villagers back on their feet in time for the harvest. Indeed, when Gaius was consulted he said that he alone would not be enough. He needed help. And so the debate continued. None of the more experienced physicians could accompany Gaius as their skills may well be needed in Camelot. Who had enough medical knowledge to assist Gaius, but would not be missed in the city?
In a rare moment of inspired wisdom, Arthur provided the answer. Merlin would go.
And so the very next day, Gaius, Merlin and the farmer from Willowcombe set off on their quest with many supplies and a large company of knights and guards. It was extremely unlikely that they would find themselves in trouble.
Unfortunately, without the Court Physician and the secret warlock working without notice from their cluttered chambers, the same could not be said for Camelot.