Series 2 contains records primarily connected to Hoge's editorial position at Foreign Affairs, including correspondence and background materials related to particular articles, authors or foreign affairs subjects. Included are records related to the administration and design of the magazine as well as Hoge's arrival and departure as Editor.

The letters in Series 1: Correspondence are primarily personal in nature, though some business correspondence is also included. Most of the correspondence dates from the Birds' time living in the Middle East and India in the 1960s and 1970s, though there are also letters that predate and postdate Eugene's tenure with the Foreign Service. In addition to the Birds' outgoing letters describing their lives to family and friends, the series also contains a large portion of letters that the Birds received from their children and from other Foreign Service families.

Series 3: Subject Files contains notes, reports, correspondence, news clippings, and other materials. Though the bulk of the series pertains to Saudi Arabia or the Middle East more generally, there are also materials on India and some biographical information on Eugene and Jerine Bird.