...The sugar-cane thrives, as also coffee and cotton, and indigo is a weed... 
David Livingstone 「Missionary Travels and Researches in South Africa」
...The more distant peakswere soft gray-blues and purples, those nearer, indigo and black...
Mary H. Kingsley 「Travels in West Africa」
...I observed likewise, near the towns, small patches of cottonand indigo...
Mungo Park 「Travels in the Interior of Africa, Vol. 1 [of 2]」
...To-day I saw, for the firsttime, the indigo plant—neela in Arabic, and bala inSoudanese...
James Richardson 「Narrative of a Mission to Central Africa Performed in the Years 1850-51, Volume 2」
...The back parts are allcovered with a paste of indigo...
James Richardson 「Narrative of a Mission to Central Africa Performed in the Years 1850-51, Volume 2」
... Predators are known to include alligators, indigo snakes, king-snakes, largemouth bass, and blue herons; there are probably numerous others...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Ridgway states that its haunts resemble thoseof the Field Sparrow or Indigo Bunting...
Frank M. Chapman 「What Bird is That?」
...The bird's haunts are not unlike thoseof the Indigo Bunting, and its song is said to resemble theIndigo's but to be more feeble...
Frank M. Chapman 「What Bird is That?」
...Thespecies hybridizes with the Indigo Bunting in the western half of theState...
Richard F. Johnston 「The Breeding Birds of Kansas」
... Straightway, oxidization works upon the product: the indigo is reformed, insoluble and blue...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...“Now Aponītolau, you must marry Gintᴇban who lived in Baygan, forthis place is surrounded with water blue as indigo and many crocodiles lie in that water...
Fay-Cooper Cole 「Traditions of the Tinguian: A Study in Philippine Folk-Lore」
...Face to face with ruin because of the failure ofthe indigo crop, he staked his all on the granulation of sugar...
Various 「The Journal of Negro History, Vol. I. Jan. 1916」
...Again,for want of indigo, they dye Selinusian or anularian chalk with woad,which the Greeks call ἱσἁτις, and make an imitation of indigo...
Vitruvius 「Ten Books on Architecture」
... Carmineand Prussian blue producing the richest color, which may be deepened inthe shadows by a slight addition of indigo or brown...
Henry H. Snelling 「The History and Practice of the Art of Photography」
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