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Rivers building firm on, 107, 133; decline of shipbuilding, 136; steamboat building on, 137–140; comparative steamboat tonnage on, 144–149; rivermen on, 151–188; houseboatmen on, 178–182; gambling on, anecdotes of, 182–187; pirates on, 187–188; history of improvements of, 191–220; prehistoric condition of, 190; money spent on improvements, as compared with Cumberland Road, 189; obstruction in navigation, 193–201; history of Louisville and Portland Canal around falls of, 203–207; growth of coal shipping on, 211; appropriations for improvement of, 215–220; journey down Virginia shore of (1796), 12, 73–75; description of busy scenes on (1796), 74–75; typical conditions in pioneer town on (1796), 74–77; boatmen described, 87; Washington calls Allegheny, 13, 38; link in Washington's plan of communication, 38–50; Washington on early navigation of, 38–42; Baltimore and Ohio Railway reaches, 134.
 * Onondaga, in Washington's plan of communication, 13, 47.
 * Potomac: compared to Po at Cremona, 5, 86; Washington urges improvement of, 13, 35–50; Washington's study of navigation of, 36–50; Virginia committee appointed to confer with