Correspondence and other material concerning the construction of an apartment house in Portland, Oregon, personal financial ledgers, journals, and check registers.

Correspondence, publications, articles by and about Callender and his residential architecture designs. Also personal papers including scrapbooks of a year spent as a visiting professor in Taiwan.

Minute books, stock records and financial records of the company formed to manage the Day family properties in Wallace and elsewhere. Also records of the sale of the Galena Home tracts in Osburn, Idaho.