well launched into his query before I realized that I ought to recognize him from other times and places.
"I am Mitric Galvadon," he said, "a private citizen assisting Academician Ulwy Munt here"—he indicated a small, pallid man in a scholar's robe and pin, who hovered at Galvadon's elbow—"in his researches into the original inhabitants of this world."
"Indeed," I said, and made the appropriate gestures while my memory sought through the back reaches of my mind for information on where and when I had encountered this Galvadon before.
Meanwhile, he had voiced his question. "What is your opinion of time travel?"
"It is scarcely a matter of opinion," I said. "It is simply impossible."
"And if I were to provide you with incontrovertible proof that I can reach back into the past and retrieve objects from far antiquity?"
"I would conclude that you are a fraud," I said. With the words came the connection in the back of my head and I continued, "Especially since you are not named Mitric Galvadon but are instead one Orlin Borissian, the infamous charlatan and fraudster extraordinaire whose file at the Archonate's Bureau of Scrutiny on Old Earth strains its bindings."
"I wondered if you would recognize me," he said, though he did not seem at all discomfited to be revealed as a bogus. Academician Munt, however, was regarding his research assistant with an intense stare, behind which a number of emotions seemed to be competing for dominance.
"Yours is a face fixed in the memories of many, most of whom regret ever having set eyes upon it," I said.
"Nonetheless," the outed fraudster went on, "I possess the ability to reach through time and I ask for an opportunity to demonstrate it to you tomorrow."
"Why?"
He tipped back his plump hat. "Because if there is any flimflammery involved, you will be able to spot it."
"I am confident that is so," I said.
"Conversely, if you cannot identify any subterfuge," he said, "it means that I can indeed do what I say I can."
"Hmm," I said.
"I believe I have intrigued you," he said.
"Indeed, you have."
We flew out in the Dean's four-seater volante to where Ulwy Munt had established his research premises on a rocky plain some distance from Five City. We descended to a huddle of prefabricated buildings nestled in the circular ruins of a large structure built by the Thim, the planet's long vanished autochthones. Almost all that was known about the Thim, even their name, had come from Munt's investigations among the tumbled and weatherworn blocks of stone that were almost their sole legacy.
The only other remnants of Thim civilization ever found had come from the same site and were displayed on a table in Munt's laboratory. I inspected the sparse collection, gingerly handling the few shards of ceramics and scraps of corroded metal, while he invited me to hazard a guess as to their functions.
"Probably used for ritual purposes," I said. I knew that this was the label customarily applied to any ancient object whose use was not glaringly obvious even to an uninterested child.
Munt seemed put out by my assertion. I concluded that he had wanted me to offer some other explanation so that he could triumphantly contradict it. Indeed, I sensed that Munt had not warmed to me and deduced that he had not enjoyed having his research assistant identified as a notorious fraudster in front of his colleagues. He probably felt that the association reflected poorly on his judgment.
To mollify him I said, "What can you tell me about the Thim?" and was immediately regaled with a lengthy and detailed dissertation on the appearance, history and cultural proclivities of the missing autochthones. After several minutes of giving polite attention I realized that I had opened a tap behind which stood a full ocean of information, each datum more abstruse than the last, and that Ulwy Munt was not inclined to hinder its flow.
The gist of his discourse was that the Thim had been a species of high-minded souls who