Some of the people whose work and efforts helped creating this story:

• Gwen Brodie, Hudson/St.Lazare Reformed Presbyterian Church, Quebec
• Ellen Byrne, Sierra Club, librarian
• Ginny Caldwell, Geneva College, director of alumni relations
• Linda Eade, Yosemite National Park, research librarian
• Mark Fincher, Yosemite National Park, wilderness specialist & climbing program manager
• Fiona Hamilton, Burlingame Historical Society
• Kae Kirkwood, Geneva College, McCartney Library, archival librarian
• Dennis Kruska, Clyde scholar
• Deborah Osterberg, National Archives, Pacific Region, San Francisco
• Connie Popelish, Sierra National Forest, district archeologist, Bass Lake Ranger District
• Susi Raub-Vogler, The Nature Friends, international secretary
• Anton Rettenbacher, (Austrian Embassy, Singapore), commercial attache
• Arno Rettenbacher, (Clemson University, South Carolina), scientist
• Richard Rettenbacher, (Tulln, Austria)
• Alan Ritter, hiker, climber and an eclectic traveler
• Deanna Schiel, The Nature Friends, member
• George Sinclair, Loma Prieta Rock Climbing Section, climber and Sierra historian
• Todd Sutter, The Nature Friends, Muir Woods Clubhouse, caretaker
• Park Trefts, (San Diego), university professor
• Rose Watabe, GeoData Center, Geophysical Institute, Fairbanks, supervisor
• John E. (Jed) Williamson, Accidents in North American Mountaineering, editor

My sincere thanks also go to:

• Many Rettenbachers, all around the world, who kindly checked with their families in an effort to find any information about Conrad and Anna.
• All the photographers who allowed me to use their beautiful pieces from the Ritter Range.
• All the helpful and accommodating librarians in San Francisco Main Library, Burlingame Library, Palo Alto Library, Stanford University Libraries, Mountain View Library, San Jose Main Library, Bancroft Library at University of California, Berkeley, and Mono County Libraries in Bridgeport and Mammoth Lakes.
• Two special people in my life who patiently read and corrected many sections of the manuscript.