The following scans are from the 1880 book, "The American Boy's Handy Book: What To Do and How To Do It" by Daniel Carter Beard. Keep in mind, this book was written less than a scant 40 years after vulcanization was developed and perfected by Charles Goodyear and Thomas Hancock and therefore, the weapons described here may in fact represent the very first slingshot crossbows ever devised. It's remarkable how much they resemble some of the weapons Jörg and others have made in modern times (great minds think alike, eh? ). Enjoy! Here's a ball-shooting version (supposedly, it's accurate enough to snuff a candle at 50 paces!): And yes they even had pistol versions, too! I went ahead and included the passages about the "spring shot-gun," even though it's not technically a sling weapon, being powered by a whalebone spring, because I think this idea could be adapted for rubber.