“Perhaps an animal got it,” Terence said, and I had a good idea which animal.

“I must catch another specimen,” Professor Peddick said, unloading the fishing pole and tackle.

“There isn’t time,” Terence said, “and you’ve still got your albino gudgeon.”

Yes, I thought, and it had better be put under lock and key, or an animal might get it, and we’d never get to Muchings End.

“We need to start, sir, if we intend to make Runnymede by tomorrow,” Terence said.

“ ‘Non semper temeritas es felix,’ ” the professor said, selecting a fly from his box. “ ‘Rashness is not always fortunate.’ Remember, if Harold had not rushed foolishly into the fray, he would have won the battle of Hastings.” He meticulously tied the fly to his line. “Early morning is not the best time for chub,” he said, making practice casts. “They do not usually rise before late afternoon.”

Terence groaned and looked beseechingly at me.

“If we leave now, we can be to Pangbourne by late afternoon,” I said. I unfolded the map. “It says the Thames at Pangbourne has long been a favorite spot of the angler. It is a perfect spot for barbel.” I read aloud, “Superior perch, roach, and gudgeon. Plenty of dace and chub. The weir stream is famous for large trout.”

“At Pangbourne, you say?” Professor Peddick said.

“Yes,” I lied. “It says, ‘There are more fish of every kind at this spot on the Thames than at any other.’ ”

That did it. He got in the boat.

“Thank you,” Terence mouthed and pushed off before he could change his mind.

I looked at my pocket watch. Twenty past VIII. Later than I’d hoped, but we could still be to Muchings End by five if things went well.

They didn’t. Abingdon Lock was closed, and it took us a quarter of an hour to wake up the lock-keeper, who took it out on us by letting the water out of the lock at a trickle. In the meantime, the rearward stack of luggage had overbalanced, and we had to stop twice and tie it into place.

The second time Professor Peddick announced, “Do you see those water lilies? And that swift-moving current near the bank? Perfect for barbel,” and clambered out of the boat before we could stop him.

“There isn’t time,” Terence said helplessly.

“Pangbourne,” I reminded him.

“Pshaw,” he said, and I would have been impressed at yet another Victorian exclamation if I hadn’t had the carpetbag and the fate of the universe to worry about. “There can’t be a more perfect spot than this.”

Terence took out his pocket watch and looked despairingly at it. What would get him moving? The Battle of Hastings? Salamis? Runnymede?

“This is how I’ve always pictured Runnymede,” I said, waving my hand at the meadow beside us, “the mist rising from the fields as King John and his men rode in. Where do you think the actual signing took place? Runnymede or Magna Carta Island?”

“Runnymede,” he said. “The King is proved to have spent the night in Staines and ridden to the field in the morning.”

“Ah,” I said. “I believe Professor Overforce makes an extremely convincing case for Magna Carta Island.”

“For Magna Carta Island?” he said disbelievingly.

“Extremely convincing,” Terence said. “It goes along with his theory of history being the result of natural forces.”

“Balderdash!” Professor Peddick said and flung the fishing pole down.

Terence snatched it up and stuck it in the boat.

“Convincing case?” Professor Peddick steamed. “There is undisputable evidence that the signing took place in Runnymede.” He climbed in the boat. I grabbed up the rope and cast off. “What sort of convincing case? There were far too many barons and lords to fit on the island, and King John was far too suspicious to let himself be in a situation with no avenue of escape. Natural forces!”

And so on till we reached Abingdon.

It was a quarter past nine by the time we got through the lock and up to the village.

Professor Peddick went off to send his telegram, and Terence went into the village to buy bread and sliced meat so we wouldn’t have to stop and cook lunch.

“And a bottle of milk,” I called after him. As soon as they were out of sight, I opened the carpetbag and checked on Princess Arjumand.

Still sleeping. I left the carpetbag open, set it between my knees, and took up the oars. Terence had done all the rowing this far, but he couldn’t keep it up all day, not if we were going to make good time. And rowing was rowing. It couldn’t be all that different from supraskims. Except that the oars were a good deal heavier. And less balanced. When I pulled back on them, nothing happened.

I sat up straight on the seat, braced my feet, spit on my hands, and yanked back on the oars.

This time something happened. The right oar came out of the water, the oar handles banged together violently, smashing my knuckles, the left oar came unshipped, and the boat swung around and headed straight for the stone wall of the bridge.

I scrambled to get the oar back in its oarlock and both of them in the water before we hit the bridge, banging my knuckles together again in the process, and bringing us up against the bank.

Cyril stood up and waddled over to the bank side of the boat, as if preparing to abandon ship.

All right, third time’s a charm. I managed to push the boat away from the bank with an oar, get it out in the current, and tried again, watching to make sure the handles didn’t hit me on the knuckles. They didn’t. The left one swung up and hit me on the nose.

But on the fourth try, I got it, though rather clumsily, and after a few minutes I had mastered the fundamentals. I took the boat out across the current and then under the bridge and back again, rowing smartly and with a good deal of dash.

“No, no!” Terence said behind me. “Not like that. Throw your weight onto the sculls at the beginning of the stroke.”

I looked back at him, standing on the bank, and both oars came out of the water and smacked me on the hand.

“Don’t look back! Watch where you’re going!” Terence shouted, which struck me as a bit unfair. “One hand over the other. Keep the trim. No, no, no!” he shouted, gesticulating with the bread in one hand and the milk bottle in the other. “Get forward. Open your knees. Keep her head out. Remember your seat.”

There is nothing more helpful than shouted instructions, particularly incomprehensible ones. I did my best to follow the ones I could understand, which consisted of, “Open your knees,” and was rewarded by Terence shouting, “No, no, no! Bring your knees together! Feather! You’ll catch a crab! Head up!”

But eventually I got the hang of it and, keeping the trim, head up, weight on the sculls, knees open and closed, and keeping my seat fully in mind, I rowed back across to him.

“Slow and steady,” Terence said as I brought the boat neatly up to the dock. “That’s it. Very good. All you need’s practice.”

“Which I should have plenty of opportunity to get,” I said, taking the milk bottle from him and sticking it in my pocket. “Let’s go. Where’s Professor Peddick?”

Terence looked round as if expecting to see him. “He hasn’t come back from the telegraph office?”

“No,” I said, climbing out and tying up the boat. “We’d best go look for him.”

“One of us had best stay here with the boat,” Terence said, looking severely at Cyril. “In case he comes back.”

“Excellent idea,” I said. While he was gone, I could check on the cat again and perhaps let it out.

“You should be the one to go,” Terence said. “You’re better at history.” He pulled out his pocket watch and looked at it.

I took advantage of his distraction to pick up the carpetbag and hide it behind my back.

“Ten o’clock,” he said, snapping the watch shut savagely. “I should have insisted on taking him home the moment we pulled him in.”

“There wasn’t time,” I said. “Besides, you said yourself there’s no stopping him if he’s determined.”