Who is Dean Borsh (Father Borsh) from Meetings with Remarkable Men and what is their importance?

Dean Borsh is Gurdjieff's first tutor. Gurdjieff had at first attended the regular school, but he shows too much promise for the standard classes. Dean Borsh suggests that he leave the school to be taught by Borsh and other accomplished teachers. Gurdjieff studies his subjects very diligently, learning all he can from books, Dean Borsh, and the other teachers. However, the book learning only goes so far.