From Introduction: "A review is given of the nomenclature, sources, imports, statistics, common methods of preparation, and testing of mineral pigments. A description of the Deer Park-Spokane colored-clay district and the laboratory methods of preparation of these colored clays, ochers, and siennas follows. The following report is merely preliminary in nature, only three months during the summer of 1927 being devoted to the laboratory investigation."

Postcard sent from Mrs. A. Chittick, Salem, Oregon to Cecelia McKie thanking her for the message from her son and stating McKie's letter was sent to her from Mrs. Larsen. She states William Chittick's children are also prisoners and that Mrs. Larsen is Mrs. Chittick's mother.