M.B. Boissevain was Marin’s first farm advisor. An exhibit of Boissevain’s photographs is showing at the Marin County Civic Center until April 26. A book based on the exhibit, M.B. Boissevain, Marin’s First Farm Advisor, Historical Photographs of Marin’s Agrarian Roots: 1920–1950, is avail- able for purchase at local bookstores and through UCCE Marin online at UCaNR.org/Boissevain.