Relander's personal papers include his personal correspondence and documentary evidence of his professional and personal relationships. He was a prodigious letter writer and saved most of his correspondence.
Outgoing letters are unsigned carbon copies. They contain information gathered by Relander during the
course of his research and relate to his interests
in writing, Pacific Northwest Indians, history, sculpture, Priest
Rapids, and the Yakima Valley.
Incoming letters include all personal correspondence addressed to Relander.
Letters from the Washington State Historical Society, Republic
Publishing Company and other organizations are filed in this series
when the topic of the letter concerns more than Relander's work as
a member of those organizations.