Full of eighteenth-century British flavor, the second floor library echoes the look of an English country house, down to the Chippendale gaming table. Continuing the style begun in the larger first floor library, wall paneling, furnishings, and sporting paintings complete the theme. A large portrait by Sir Oswald Birley of Eleanor Barzin, Marjorie Post’s second daughter, in riding costume, presides over one end of the room. Above the English mantel on the opposite end hangs a 1940s portrait of an elegant Marjorie Merriweather Post by Frank O. Salisbury.

Designed as an extension of the Adam bedroom, this cozy space provided an alternative from the formality of the first-floor rooms. A grand view of the Lunar Lawn and Rock Creek Park greets guests retreating to the library.