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	- Robert Elliott O'Callaghan (en)
 
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	- English vegetarianism activist, lecturer, and writer (1855–1936) (en)
 
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	- Image is an oval, black-and-white portrait of a distinguished man with a beard and bow tie (en)
 
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	- Robert Elliott O'Callaghan (en)
 
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	- St Pancras, Middlesex, England (en)
 
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	- Portrait from Fifty Years of Food Reform (en)
 
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	- Longsight, Manchester, England (en)
 
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	- Vegetarianism activism (en)
 
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	- writer (en)
 
	-  (en)
 
	- Activist (en)
 
	- lecturer (en)
 
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	- Southern Cemetery, Manchester (en)
 
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	- R. E. O'Callaghan signature.svg (en)
 
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	- 1888 (xsd:integer)
 
	-  (en)
 
	- Mary Ann Barry (en)
 
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