On Saturday the University entertained as notable and important an assemblage of guests as have visited Cambridge in recent years. Individually the Pan-American delegates represent the leading business and governmental interests of South America; and collectively they stand for the new Pan-Americanism, which hopes to bring the northern and southern halves of the western hemisphere into the business and political relations which should be theirs. This war has brought home to both North and South America the dangers they may be in at any time from European aggression. The United States has long believed that the Monroe Doctrine is necessary for its safety as well as for that of South America. And the southern republics should now see that the American navy may yet prove of great importance for their protection. It is fitting that Harvard, which with its new chair of Latin-American affairs is making a beginning in the educational part of the Pan-American movement, should be an object of inspection to the delegates. It would be highly desirable if an exchange of professors and students with universities of South America could result from this visit.