JFK letters going on auction block

PHILADELPHIA, Pa. - February 29, 2008 - The correspondence has been given a value of $210,000 by the Philadelphia-based dealer, The Raab Collection.

In a 1960 letter, before he was elected president, Kennedy tells Brown that the country's future success is contingent upon how its natural resources are managed. He reiterated that belief in a 1962 letter while he was president.

Among the other correspondence is a March 1966 letter to Brown from President Johnson expressing his continued support for the Vietnam War.