As of March 2011, it looks like this image will be used in a brochure for the company whose piping was used in the renovation of the mansion. - Jmabel ! talk15:05, 17 March 2011 (UTC)[reply]
Peterson, David (2020-10-29). Cassel Crag (PDF). Landmark nomination application 39. Seattle Department of Neighborhoods. Retrieved on 2023-09-11. Figure 37 (upper right), p. 38 of document, p. 39 of PDF
Peterson, David (2020-10-29). Blackford Hall at Virginia Mason (PDF). Landmark nomination application 51. Seattle Department of Neighborhoods. Retrieved on 2023-09-13. Figure 37 (upper right), p. 50 of document, p. 51 of PDF