1. “A Moving Staircase.” Ferndale Enterprise (Ferndale, California), April 7, 1899, 2.
2. “A Moving Staircase at the Crystal Palace.” Daily News (London), August 4, 1900, 9.
3. Ad for Bon Marché, Spokesman Review (Spokane, WA), September 10, 1948, 30.
4. Ad for Frederick Loeser & Co. Brooklyn Times Union, November 13, 1899, 12.
5. Ad for J. C. Penney, Spokane Chronicle (Spokane, WA), September 9, 1948, 70.