Foreword -- Introduction -- The early clothing industry of San Francisco -- THE INVENTORS AND MANUFACTURERS OF STRENGTHENED WORK PANTS -- Levi Strauss & Company -- Greenebaum Brothers -- Neustadter Brothers -- S.R. Krouse -- A.B. Elfelt & Company -- Heynemann & Company -- B. & O. Greenebaum Company -- Harmon Adams -- W. & I. Steinhart & Company -- Toklas, Brown & Company -- William G. Badger & Company -- Meyerstein & Lowenberg -- Felix Kivi -- Banner Brothers -- Yung Chow -- Charles A. Jones -- Pre-1873 work pants -- Post-1890 work pants -- Additional nineteenth century clothing items from the Old West -- Denim manufacturing & wear patterns of late nineteenth century jeans -- Late 1800s items from the Old West -- Conclusion -- References