What is Mr. Henderland’s opinion of Alan Breck? From chapters 13-16

 He describes Alan as a "desperate" character and self-absorbed.

"It's highly possible," said he, sighing. "But it seems strange ye shouldnae carry it. However, as I was saying, this Alan Breck is a bold, desperate customer, and well kent to be James's right hand. His life is forfeit already; he would boggle at naething; and maybe, if a tenant-body was to hang back he would get a dirk in his wame."