Description Title A newly constructed and improved map of the State of California : shewing the extent and boundary of the different counties according to an act passed by the Legislature April 25th, 1851 with a corrected and improved delineation of the gold regionContributor Names Tassin, J. B., cartographer, compiler. Cooke & LeCount, publisher. Created / Published San Francisco : Published by Cooke and Lecount, 1851. San Francisco : Lith. by Pollard & Peregoy, 1851. Subject Headings - California--Maps - California--Gold discoveries--Maps - Counties--California--Maps - Nevada--Maps - United States--California - United States--Nevada