Parenthesized numerals are references to the numbered quotations on the handout.
Notice also the examples he gives of the two sorts. The best known presentation of natural law theory is that given by Thomas Aquinas, whose views on the law were influenced by both Aristotle and the tradition of Roman law. Austin's approach to the law is characterized by careful definitions of various legal concepts. One way to summarize Austin's view is to say that law is the command of the sovereign. There were a number of representatives of this approach to the law, but Holmes provides one of the clearest statements of the view.