Well as quickly as I thought I might have found some good incite on these daggers.  I find the authors discredited. link 
http://www.fenimoreartmuseum.org/fil...haw/search.htm  This link shows other daggers and  clicking the last one will bring up  
http://www.fenimoreartmuseum.org/fil...t1/e10554a.htm  Note it discredits  John Witthofts claims.  Sorry, Tim, I removed most of the starchy substance with a toothpick awhile back. Here are some closeups.  Sorry about bringing an oxcart into a discussion on Mercedes.