...Attorney-General Wirtfinds it necessary to assure collectors, in 1819, that "it is againstpublic policy to dispense with prosecutions for violation ofthe law to prohibit the Slave trade... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...LINNÆUS statesthat the European species, with which book collectors are familiar,was first brought in sugar ships from America...
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
...It is perhaps a bit unfortunate that the group of butterflies,which is commonly chosen to head the list offamilies, is one that is rarely seen by most collectors...
Clarence M. Weed 「Butterflies Worth Knowing」
...During recent years many collectors have gathered thesebutterflies from all parts of North America and manyspecimens have been grouped together in the more importantcollections...
Clarence M. Weed 「Butterflies Worth Knowing」
...Occasionally they becomeabundant in certain localities, but on the whole they arerare and highly prized by collectors...
Clarence M. Weed 「Butterflies Worth Knowing」
...The cattle would act simply as collectors of ticks which would bedestroyed regularly by the treatment applied every two weeks...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...By the middle of the last century it had become a rarity, and the ensuing rush for specimens and eggs for private collectors quickly brought about its virtual extinction...
W. H. Hudson 「Birds in Town and Village」
...It might have been invented on purpose to circumvent collectors,as the Almighty has been supposed by some to have createdfossils on purpose to deceive ungodly geologists...
Bradford Torrey 「The Foot-path Way」
...The operation of natural causes keeps the birds in check, but the greed of the collectors and milliners tends to their extinction...
John Burroughs 「Birds and Bees, Sharp Eyes and, Other Papers」
...Wherever we camped the local Mayans were exceptionally helpful, especially as guides and collectors...
Erwin E. Klaas 「Summer Birds From the Yucatan Peninsula」
...This undertaker isendowed, they say, with intellectual faculties approaching to reason,such as are not possessed by the most gifted of the Bees and Wasps,the collectors of honey or game...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
... Bree many years ago; but it is less abundant there than formerly, from the repeated attacks of collectors, who catch all they can find...
W. S. Coleman 「British Butterfiles」
...—KU 100971-2 collected with the holotype andKU 100974-5 from 30 kilometers north of San Gabriel Mixtepec, Oaxaca,México, elevation 1530 meters; same date and collectors...
William E. Duellman 「Descriptions of New Hylid Frogs From Mexico and Central America」
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