The Petaluma Branch of the Sonoma County Library discovered that an "old and irreplaceable map has disappeared from collection". It is the 1852 'Map of Lands of Petaluma', and probably is the original plat map from the first survey of the settlement. The map is similar to this one held by UC Berkeley: http://content.cdlib.org/ark:/13030/hb8779p17c/ If you know its whereabouts, please contact Kate ... [more]