Here is a link to a bio for Seth Benjamin Tanner on Wikipedia.  There is some good information I had not seen before, and links to information on Tanner Trail in the Grand Canyon.

http://en.wikipedia.org/wiki/Seth_Tanner

This is another great link with information on the Grand Canyon, with details about Tanner Trail and Seth Tanner.  “This site is part of a multi-media educational project,“Nature, Culture, and History at the Grand Canyon”.  

http://grandcanyonhistory.clas.asu.edu/sites_rimtoriverandinnercanyon_tannertrail.html

Seth Benjamin Tanner:  Photo from Grand Canyon Museum Collection, Catalog # GRCA 7060A, posted on the NCHGC site above

 

The marker at Cameron Bridge, near the spot formerly known as Tanner’s Crossing:  First posted on TheAncestorFiles.blogspot.com