About: http://webisa.webdatacommons.org/334136734

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	Letters and other documents include letters dating from the 1830s from Henry Clay, Thomas Sully, and William Henry Seward commending Catlin's work, as well as Catlin family correspondence and papers dating from 1821 through the 1870s
http://www.w3.org/ns/prov#wasQuotedFrom	si.edu