Tabitha Brown was an Oregon pioneer and a founder of Pacific University. This collection includes several original letters by Tabitha and Clark Brown, copies of her account of travels on the Oregon Trail (known as the "Brimfield Heroine" letter), written documentation of Brown family memories, and other material related to the Brown Family.

Harvey Clark was an Oregon pioneer of 1840 who helped to found Pacific University, and who owned much of the land where the town of Forest Grove now lies. The collection includes one original letter by Harvey Clark dated 1843; a facsimile and transcription of a 1844 letter; a transcription of his 1837 "memory book," a book of verses and notes written by friends; and typed biographical notes about Harvey Clark.