About: http://webisa.webdatacommons.org/312585076

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	These letters are a cut above most of what he was publishing in those last 20 years, and they explain what was going on that made those later books so disappointing, to me anyway.
http://www.w3.org/ns/prov#wasQuotedFrom	amazon.com