About: http://webisa.webdatacommons.org/290155902

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	From what I can tell in a quick web search, this letter was a reply to one sent by Thomas on 6 April 1857.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com