Harry Aleson reaching an oar so the tip of the blade was at the high level of the spring floods prior to the removal of the Separation Plaque to its present higher level

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  The second Separation Plaque on the beach below its first location after it had been removed by Aleson for the purpose of locating it at a higher elevation above top levels of Lake Mead. Christmas week, 1943

  Manuscripts

  mssMarston papers V097/0162

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  Jim Bailey and Harvey Butchart (holding the 1934 plaque) prior to the plaque replacement at Separation Canyon

  Manuscripts

  mssMarston papers V097/0169

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  The second Separation Plaque ready for installation at the higher location above the top level of Lake Mead. The plywood beneath the plaque was used as a template for drilling the holes in the preCambrian . Christmas week

  Manuscripts

  mssMarston papers V097/0163

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  Plaque placed by The Dusty Dozen at Separation Canyon, about 1934, Aug. 03. It was removed 1939, Aug. and a larger plaque placed there by Julius Stone and party. The plaque was replaced at Separation Rapid near the new plaque 1971, Nov. 27

  Manuscripts

  mssMarston papers V097/0178.01

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  Plaque at Separation Canyon prepared by Julius F. Stone and placed by him and a boat party which cruised Lake Mead 1939, Aug. It was moved higher in 1943, Dec. by Harry Aleson and party

  Manuscripts

  mssMarston papers V097/0140

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  Harry Aleson's outboard "Up Lake" at left bank below the mouth the side canyon at Separation Rapid. A glass will show the Separation Plaque at the 1939 location

  Manuscripts

  mssMarston papers V097/0160