After a memory upgrade and developing some minor knowledge of GIMP, I have wrestled the 1.9 GB file from the National Library of Australia down to a 6 MB jpeg or so, in color, with the various labels still readable.
Getting the file down to a manageable size, however, makes it much easier to look at the contents. The file from Australia was named PGTaylor, and the penciled initials "PGT" appear twice on the lower right corner. I concluded that the this particular chart was used by a notable Australian aviator, Gordon Taylor, aka Sir Patrick Gordon Taylor, MC, OBE, GC (1896-1966). Taylor deposited his papers with the National Library. Taylor learned to fly with the RFC in World War I, and was credited with five kills. After World War I, he studied engineering and air navigation, and became a line pilot for Kingsford-Smith and Ulm's Australian National Airways. He served as co-pilot and navigator for both Kingsford-Smith and Ulm on many of their pioneering flights. During World War II, commissioned in the RAAF and later the RAF, he flew flying boats between the United States and Australia. There is a current biography of Taylor in print: "The Man Who Saved Smithy."
Taylor apparently used the chart to navigate several flights out of Samoa, including a flights to Palmerston Island, Fiji, New Caledonia, and Sydney, using (it appears) dead reckoning, celestial navigation, and compass bearings on lighthouses and landmarks, presumably circa 1942. The chart is creased, and clearly was at one time folded into several sections. Possibly Taylor dealt with the size of the chart by folding it, a technique also available to Fred Noonan. The piece of HO 825 that would have been of interest to Noonan is the top 12" or so of the chart, along with the 32" width.
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