@misc{Hamilton_William_Rowan_(1805–1865)_Letter_1967,
 author={Hamilton, William Rowan (1805–1865)},
 volume={3},
 copyright={Public Domain},
 address={Cambridge},
 journal={Cunningham Memoir},
 howpublished={online},
 year={1967},
 publisher={University Press},
 language={eng},
 language={eng},
 type={Text},
 title={Letter to John T. Graves on the Icosian (1856)},
 URL={http://www.rcin.org.pl/Content/190297/PDF/WA35_223334_11536-3_art-57.pdf},
}