The barrow was long and high, covered with grass save where a raw scar showed excavation to the funeral chamber. This had been lined with rough-hewn timbers but had long ago collapsed; fragments of what had been wood still lay on the dirt. "The newspapers mentioned something about a metal casket," said Everard. "I wonder if we might have a look at it too?"
The inspector nodded agreeably and led them off to an outbuilding where the major finds were laid forth on a table. Except for the box, they were only fragments of corroded metal and crumbled bone.
"Hm," said Whitcomb. His gaze was thoughtful on the sleek, bare face of the small chest. It shimmered bluely, some time-proof alloy yet to be discovered. "Most unusual. Not primitive at all. You'd almost think it had been machined, eh?"
Everard approached it warily. He had a pretty good idea of what was inside, and all the caution about such matters natural to a citizen of the soi-distant Atomic Age. Pulling a counter out of his bag, he aimed it at the box. Its needle wavered, not much but. . . .
"Interesting item there," said the inspector. "May I ask what it is?"
"An experimental electroscope," lied Everard. Carefully, he threw back the lid and held the counter above the box.
God! There was enough radioactivity inside to kill a man in a day! He had just a glimpse of heavy, dull-shining ingots before he slammed the lid down again. "Be careful with that stuff," he said shakily. Praise heaven, whoever carried that devil's load had come from an age when they knew how to block off radiation!
The private detective had come up behind them, noiselessly. A hunter's look grew on his keen face. "So you recognized the contents, sir?" he asked, quietly.
"Yes. I think so." Everard remembered that Becquerel would not discover radioactivity for almost two years; even X rays were still more than a year in the future. He had to be cautious. "That is . . . in Indian territory I've heard stories about an ore like this which is poisonous—"
"Most interesting." The detective began to stuff a big-bowled pipe. "Like mercury vapor, what?"
"So Rotherhithe placed that box in the grave, did he?" muttered the inspector.
"Don't be ridiculous!" snapped the detective. "I have three lines of conclusive proof that Rotherhithe is entirely innocent. What puzzled me was the actual cause of his lordship's death. But if, as this gentleman says, there happened to be a deadly poison buried in that mound . . . to discourage grave-robbers? I wonder, though, how the old Saxons came by an American mineral. Perhaps there is something to these theories about early Phoenician voyages across the Atlantic. I have done a little research on a notion of mine that there are Chaldean elements in the Cymric language, and this seems to bear me out."
Everard felt guilty about what he was doing to the science of archaeology. Oh, well, this box was going to be dumped in the Channel and forgotten. He and Whitcomb made an excuse to leave as soon as possible.
On the way back to London, when they were safely alone in their compartment, the Englishman took out a moldering fragment of wood. "Slipped this into my pocket at the barrow," he said. "It'll help us date the thing. Hand me that radiocarbon counter, will you?" He popped the wood into the device, turned some knobs, and read off the answer. "One thousand, four hundred and thirty years, plus or minus about ten. The mound went up around . . . um . . . A.D. 464, then, when the Jutes were just getting established in Kent."
"If those ingots are still that hellish after so long," murmured Everard, "I wonder what they were like originally? Hard to see how you could have that much activity with such a long half-life, but then, up in the future they can do things with the atom my period hasn't dreamed of."
Turning in their report to Mainwethering, they spent a day sight-seeing while he sent messages across time and activated the great machine of the Patrol. Everard was interested in Victorian London, almost captivated in spite of the grime and poverty. Whitcomb got a faraway look in his eyes. "I'd like to have lived here," he said.
"Yeah? With their medicine and dentistry?"
"And no bombs falling." Whitcomb's answer held a defiance.
Mainwethering had arrangements made when they returned to his office. Puffing a cigar, he strode up and down, pudgy hands clasped behind his tailcoat, and rattled off the story.
"Metal been identified with high probability. Isotopic fuel from around the thirtieth century. Checkup reveals that a merchant from the Ing Empire was visiting year 2987 to barter his raw materials for their synthrope, secret of which had been lost in the Interregnum. Naturally, he took precautions, tried to pass himself off as a trader from the Saturnian System, but nevertheless disappeared. So did his time shuttle. Presumably someone in 2987 found out what he was and murdered him for his machine. Patrol notified, but no trace of machine. Finally recovered from fifth-century England by two Patrolmen named, haw! Everard and Whitcomb."
"If we've already succeeded, why bother?" The American grinned.
Mainwethering looked shocked. "But my dear fellow! You have not already succeeded. The job is yet to do, in terms of your and my duration-sense. And please do not take success for granted merely because history records it. Time is not rigid; man has free will. If you fail, history will change and will not ever have recorded your success; I will not have told you about it. That is undoubtedly what happened, if I may use the term 'happened,' in the few cases where the Patrol has a record of failure. Those cases are still being worked on, and if success is achieved at last, history will be changed and there will 'always' have been success. Tempus non nascitur, fit, if I may indulge in a slight parody."
"All right, all right, I was only joking," said Everard. "Let's get going. Tempus fugit." He added an extra "g" with malice aforethought, and Mainwethering winced.
It turned out that even the Patrol knew little about the dark period when the Romans had left Britain, the Romano-British civilization was crumbling, and the English were moving in. It had never seemed an important one. The office at London, A.D. 1000, sent up what material it had, together with suits of clothes that would get by. Everard and Whitcomb spent an hour unconscious under the hypnotic educators, to emerge with fluency in Latin and in several Saxon and Jutish dialects, and with a fair knowledge of the mores.
The clothes were awkward: trousers, shirts, and coats of rough wool, leather cloaks, an interminable collection of thongs and laces. Long flaxen wigs covered modern haircuts; a clean shave would pass unnoticed, even in the fifth century. Whitcomb carried an ax, Everard a sword, both made to measure of high-carbon steel, but put more reliance on the little twenty-sixth-century sonic stun guns stuck under their coats. Armor had not been included, but the time hopper had a pair of motorcycle crash helmets in one saddlebag: these would not attract much attention in an age of homemade equipment, and were a good deal stronger and more comfortable than the real thing. They also stowed away a picnic lunch and some earthenware jugs full of good Victorian ale.
"Excellent." Mainwethering pulled a watch out of his pocket and consulted it. "I shall expect you back here at . . . shall we say four o'clock? I will have some armed guards on hand, in case you have a prisoner along, and we can go out to tea afterward." He shook their hands. "Good hunting!"
Everard swung onto the time hopper, set the controls for A.D. 464 at Addleton Barrow, a summer midnight, and threw the switch.