From 5 to 11 April, Bergson attended the Fourth International Congress of Philosophy held at Bologna, in Italy, where he gave an address on "Philosophical Intuition". In response to invitations he visited England in May of that year, and on several subsequent occasions. These visits were well received. His speeches offered new Perspectives and elucidated many passages in his three major works: "Time and Free Will", "Matter and Memory", and "Creative Evolution". Although necessarily brief statements, they developed and enriched the ideas in his books and clarified for English audiences the fundamental principles of his philosophy.