If it happens again, first check to see if you have spark as previously stated. Second, pull the cap and see it's wet. If it is, spray around the inside of the distributor with WD40 to displace the water. I agree on the cracked cap.
Looking good, Ant and Rick!
HJ45Crewcab, have you ever seen these for a temporary fix? I think JC Whitney sells them cheaper. If all four studs are broken, it's probably not feasible.
rabid, no go on the big seat from the guy up the street. Most of his stuff is Huffy and Schwinn 10-spd crap from the late 80's. I'm going to have my friend check his uncle's house. He also collects the worthless commodity known as old rusty bicycles.