And the answer is . . . . nope. (Heavy sigh!) The pedals were on the correct crank shafts. The left unscrewed off the crank shaft easily, and Bob reattached it with no trouble. Not so much with the right pedal, however. And yes, Bob did work the wrench but I DID steady the bike!
The threads on the right pedal appeared to be in good condition but the ones in the right crank shaft appear were torn. Bob passed me the remnant of one, pictured below. After struggling to reattach it (screwing it back on from left to right . . . . ), his efforts proved fruitless. "I think you need to take this to the bike shop on Saturday," he sighed.
And so it goes. I'm taking the floppy, little dog to the groomer tomorrow morning for a long needed haircut so I'll stop by Single Track afterward and see what they have to say. I hope for a solution that does not involve waiting for weeks for replacement components or a bill over $100.