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Baronial Mansion from the Front
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Baronial Mansion from the West
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Constance Lowell at Percival Lowell's Mausoleum
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First Observation Notes of Mars by Percival Lowell in 1894
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Flagstaff It Is, April 16, 1894
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Harvard College Observatory Announcement Card 108
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Harvard College Observatory Announcement Card 121
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Lowell Observatory Observation Circular, May 1, 1930
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Percival Lowell Observing Venus During the Daytime
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Percival Lowell and G. R. Agassiz at Lake Mary Picnic, June 1907
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Percival Lowell and Guests at Picnic Near Baronial Mansion
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Percival Lowell as Santa Claus on Roof of Old Library, 1911
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Percival Lowell at His Rental Home on Leroux Street in Flagstaff
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