Smithsonian Report, 1936. — Wilbur 



1. SIXTEENTH Century Sporting Crossbow, Germany; 2. Cranequin for 

 Spanning the Sporting Crossbow. Germany: 3, Bone string-Catch From 

 PL. 4, Fig 1 ; 4, Wood String-Catch From Pi_. 4. Fig. 2. 



