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<br />TABLES <br /> <br />Table 1. <br />Table 2. <br /> <br />Table 3. <br />Table 4. <br />Table 5. <br />Table 6. <br />Table 7. <br /> <br />~ <br /> <br />Diaries from historical river trips in Grand Canyon used in this study............................................ 6 <br />Dates and observations of the Colorado River being frozen at Lee's Ferry, Arizona, <br />or other points along the river............................................................................................................ 8 <br />List of known driftwood fires in Grand Canyon, 1937-1964............................................................16 <br />Pre-dam locations of tamarisk and native trees in Grand Canyon..................................................... 19 <br />Waterbird sightings in Grand Canyon compiled from selected historic diaries ................................22 <br />Sightings of bighorn sheep in Grand Canyon during pre-dam river trips.......................................... 25 <br />Anecdotal accounts of native and non-native fishes in the Colorado River in Grand Canyon ......... 28 <br /> <br />Contents iii <br />