Hi Bill,
we discussed catapults in this thread.....I think the major confusion is the use of the term 'slingshot' and 'catapult'. Lew's example is a catapult likely early-mid 19th C but certainly not older than the 1910's. The slingshot is a totally different 'animal'......a length of cord with a 'pouch' in the middle...which is swung to launch a projectile....which was first used thousands of years ago.
http://www.vikingsword.com/vb/showth...ight=catapults
Regards David