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Wilkes, Charles [copy of letter from Charles WIlkes to John Torrey] Mar. 16, 1857
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Gray, Asa [fragment] [draft response to Mar. 16, 1857 letter from Wilkes to Torrey] 1857
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Gray, Asa [with overlay] [draft] [to James A. Pearce] Apr. 2, 1857
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Gray, Asa [copy of letter to Joseph Henry] Jun. 2, 1882
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Wilkes, Charles Jun 24, 1848
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Wilkes, Charles Oct. 6, 1848
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Wilkes, Charles Apr 24, 1849
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Wilkes, Charles Dec. 20, 1849
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Wilkes, Charles Apr. 3, 1850
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Wilkes, Charles [undated]
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Wilkes, Charles [to James A. Pearce] Apr. 23, 1852
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Henry, Joseph May 23, 1852
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Henry, Joseph May 27, 1852
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Henry, Joseph Jun. 16, 1852
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Gray, Asa [Separate letters to James A. Pearce and Charles Wilkes on same page] Jun. 18, 1852
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Gray, Asa [to Charles Wilkes] Jul. 17, 1852
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Gray, Asa [to Charles Wilkes] Jul. 17, 1852
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Wilkes, Charles May 14, 1853
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Wilkes, Charles Dec. 23, 1856
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Torrey, John E. [extract from letter] Jan. 8, 1857
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Wilkes, Charles Jan. 24, 1857
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Wilkes, Charles Feb. 20, 1857
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Wilkes, Charles Mar. 2, 1857
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Wilkes, Charles Mar. 17, 1857
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Wilkes, Charles May 5, 1857
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Wilkes, Charles Jul. 7, 1857
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Wilkes, Charles Sep. 3, 1857
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Wilkes, Charles Sep. 22, 1857
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Gray, Asa [includes receipt] Sep. 24, 1857
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Wilkes, Charles Sep. 27, 1857
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Wilkes, Charles Sep. 28, 1857
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Gray, Asa [to Charles Wilkes] Sep. 29, 1857
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Wilkes, Charles Oct. 2, 1857
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Wilkes, Charles Oct. 20, 1857
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Wilkes, Charles Nov. 5, 1857
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Wilkes, Charles Nov. 28, 1857
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Wilkes, Charles Feb. 11, 1858
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Wilkes, Charles Feb. 12, 1858
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Wilkes, Charles Feb. 15, 1858
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Wilkes, Charles Feb. 24, 1858
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Wilkes, Charles Nov. 3, 1858
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Wilkes, Charles Mar. 30, 1873
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Wilkes, Charles Jun. 9, 1874