Due to the replies here, I felt that it would be OK to jump the car from another, and found that the starter turns the engine over. I think that a new solenoid didn't hurt, and also that the old battery simply won't hold a charge against the starter.

I don't recall that I had run the carb dry, but I did pump out the gas tank and fuel lines years ago, so they're in good shape. I'll take the carb off for a good rebuild, and finish giving the cylinders an oil bath. I found that I had to rebuild the carb every spring, anyway, due to crud left in there by ethanol-laced fuel. Or, at least that's what I was told.

Thanks for all of your help.
Dorsey