The first pdf is a useful commentary on Popper's "Objective Knowledge" from
David Miller, Popper's former Research Assistant and a foremost exponent of
Popper's theory of knowledge.
The second is a copy of Popper's _LdF_ of "Logik der Forschung" ['Logic of
Research"] in its English translation as "The Logic of Scientific Discovery".
Happy St. Patrick's Day to all.