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"Containing an accurate account of the earthquakes experienced here from the 16th of December, 1811 to the 7th of February, 1812, extracted principally from the papers of the late J. Brookes, Esq." -- Appendix from Sketches of Louisville and its environs. First edition, Louisville, printed by S. Penn, Jun. Main-Street, 1819. "Jared Brooks was an engineer living in Louisville, KY, at the time of the New Madrid earthquakes. His observations and notes, published posthumously... provide extensive documentation on the sequence. In addition to constructing his own intensity scale, Brooks devised a system with pendulums and springs -- essentially an analog seismometer -- and observed when the various components were in motion. Unfortunately this system is not described in detail, but the published notes still represent an invaluable collection of thorough and detailed observations. The pages... are full-resolution, full-sized JPG scans of copies from the original reference. The resolution and page sizes are preserved to facilitate reading."-- webpage of Susan E. Hough, U.S. Geological Survey, Pasadena, California