Robert Amsterdam Burt, Charles Edward Ruas, James LeBaron Stinnett, and Nicholas Churchill Yost, Class of 1960, were undergraduate roommates at Princeton. Their letters to each other, as well as some letters from other classmates from the classes of 1960 and 1961, were written in the summers while they were undergraduates, as well as during the several years afterwards, as they pursued graduate studies, various jobs, and sometimes traveled or lived abroad.

The first series consists primarily of letters from Robert Burt to Charles Edward Ruas '60, as well as some letters to James Le Baron Stinnett '60 and Nicholas Churchill Yost '60. Much of the correspondence was sent after the classmates left Princeton, during the period 1960-1964.

The second series of correspondence consists of a donation from Charles Ruas of letters he received between 1957 and 1966 from John Coe '60, Nicholas Yost, James Stinnett, Edward Pell '60, William Wu '61, and a postcard from Paul Oppenheimer '61.