When the knocking came late at night, Arthur was embracing the warmth of holding Pendragon, writing about the mystical knowledge he had discussed with Alberts three days prior—a warm kitty, softly purring, far better than a hot water bottle, which gave Arthur an inexplicable sense of comfort.
As for writing?
Even the best memory could not compare to writing.
Unless you possess a constant "Memory Technique" or a similar secret technique.
If not?
Then writing would be a remedy.
Moreover, Arthur was well aware that he was "fundamentally weak." Such writing was not only a better record but could also help him effectively organize his framework of mystical knowledge.
However, the knocking interrupted him
But Arthur was not annoyed at all.
Because that was the secret code with Wiggins.
'So fast!'
'Worthy of the 'Mouse Council'!'
