If I was given the post, Colles was bound to consider what I had said in my earlier letter and give me some directions.
I might take it, therefore, that the scribble was Colles' reply to my letter.
Inside was a sheet of the firm's notepaper, with the signature of Colles across the top.
Colles told me that you were a keen fellow, and had wind of some mystery here.
Like Colles' fracture, it may be transverse or slightly oblique, impacted, or comminuted.