The writer describes a side of Detective Wilson's character which .

The famous English detective Thomas Wilson
was actually a great lover of music; he often
played the violin and even composed some
music. He would sometimes spend a whole
afternoon, listening to music, and this would
make him extremely happy. On such occasions
he grew gentle and dreamy, quite unlike the
sharp, clever and rather frightening detective that
everybody knows him to be. But such a mood
rarely lasted long and when it left him, he was
more alert and businesslike than ever.