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Archive of several hundred letters addressed to Joseph R. and William F. Knowland both in their political offices and as editors and publishers of The Oakland Tribune (a few addressed to other members of the Tribune staff). Includes a wide array of colorful billheads from California organizations and businesses.

Joseph Knowland became owner of the Oakland Tribune in 1915 and was succeeded by his son William. Both father and son were active in state and national politics with the elder Knowland serving in the California State Assembly and State Senate and later in the U.S. House of Representatives. The younger Knowland also served in both the State Assembly and Senate and later in the United States Senate.