Although Uthacalthing agreed with that assessment, he considered Kault less than an,impartial observer. And the Thennanin was hardly the one to accuse others of being humorless.

Anyway, one thing was obvious. So long as Kault was distracted like this, thinking about the Gubru, it would be useless to try to draw his attention to subtle clues and footprints in the ground.

He could sense movement in the prairie all around him. The little carnivores and their prey were all seeking cover, settling into small niches and burrows to wait out midday, when the fierce heat of summer would beat down and it would cost too much energy either to give chase or to flee. In that respect, tall Galactics were no exception. “Come,” Uthacalthing said. “The sun is high. We must find a shady place to rest. I see some trees over on the other side of the water.”

Kault followed without comment. He appeared to be indifferent about minor deviations in their path, so long as the distant mountains grew perceptibly closer each day. The white-topped peaks were now more than just a faint line against the horizon. It might take weeks to reach them, and indeterminably longer to find a way through unknown passes to the Sind. But Thennanin were patient when it suited their purposes.

There were no blue glimmerings as Uthacalthing found them shelter under a too-tight cluster of stunted trees, though he kept his eye “peeled” anyway. Still, with his corona he thought he kenned a touch of feral joy from some mind hiding out there on the steppe, something large, clever, and familiar.

“I am, indeed, considered to be something of an expert on Terrans,” Kault said a little later as they made conversation under the gnarled branches. Small insects buzzed near the Thennanin’s breathing slits, only to be blown away every time they approached. “That, plus my ecological expertise, won me my assignment to this planet.”

“Don’t forget your sense of humor,” Uthacalthing added, with a smile.

“Yes,” Kault’s crest puffed in the Thennanin equivalent of a nod. “At home I was thought quite the devil. Just the sort to deal with wolflings and Tymbrimi pixies.” He finished with a rapid, low set of raspy breaths. It was obviously a conscious affectation, for Thennanin did not have a laughter reflex as such. No matter, Uthacalthing thought. As Thennanin humor goes, it was pretty good.

“Have you had much first-hand experience with Earth-lings?”

“Oh, yes,” Kault said. “I have been to Earth. I have had the delight of walking her rain forests and seeing the strange, diverse lifeforms there. I have met neo-dolphins and whales. While my people believe humans themselves should never have been declared fully uplifted — they would profit much from a few more millennia of polishing under proper guidance — can admit that their world is beautiful and their clients promising.”

One reason the Thennanin were in this current war was in hopes of picking up all three Earthling species for their clan by forced adoption — “for the Terrans’ own good,” of course. Though, to be fair, it was also clear that there were disagreements over this among the Thennanin themselves. Kault’s party, for instance, preferred a ten-thousand-year campaign of persuasion, to try to win the Earthlings over to adoption voluntarily, with “love.”

Obviously, Kault’s party did not dominate the present government.

“And of course, I met a few Earthlings in the course of a term working for the Galactic Institute of Migration, during an expedition to negotiate with the Fah’fah’n*fah.”

Uthacalthing’s corona erupted in a whirl of silvery tendrils, an open show of surprise. He knew his stunned expression was readable even to Kault, and did not care. “You… you have been to meet the hydrogen breathers?” He did not even know the trick of pronouncing the hyper-alien name, not part of any sanctioned Galactic tongue.

Kault had surprised him once again!

“The Fah’fah’n*fah.” Again Kault’s breathing slits pulsed in mimicry of laughter. This time, it sounded much more realistic. “The negotiations were held in the Poul-Kren sub-quadrant, not far from what the Earthlings call the Orion sector.”

“That’s very close to Terra’s Canaan colonies.”

“Yes. That is one reason why they were invited to take part. Even though these infrequent meetings between the civilizations of oxygen breathers and hydrogen breathers are among the most critical and delicate in any era, it was thought appropriate to bring a few Terrans along, to show them some of the subtleties of high-level diplomacy.”

It must have been his state of confused surprise, but at that moment Uthacalthing thought he actually caught a kenning from Kault … a trace of something deep and troubling to the Thennanin. He is not telling me all of it, Uthacalthing realized. There were other reasons Earthlings were involved.

For billions of years, uneasy peace had been maintained between two parallel, completely separate cultures. It was almost as if the Five Galaxies were actually Ten, for there were at least as many stable worlds with hydrogen atmospheres as planets like Garth and Earth and Tymbrim. The two strands of life, each supporting vast numbers of species and lifeforms, had almost nothing in common. The Fah’fah’n*fah wanted nothing of rock, and their worlds were too vast and cold and heavy for the Galactics ever to covet.

Also, they seemed even to operate on different levels or rates of time. The hydrogen breathers preferred the slow routes, through D-Level hyperspace and even normal space between the stars — the realm where relativity ruled — leaving the quicker lanes among the stars to the fast-living heirs of the fabled Progenitors. ^

Sometimes there were conflicts. Entire systems and clans died. There were no rules to such wars.

Sometimes there was trade, metals for gases, or machinery in exchange for strange things not found even in the records of the Great Library.

There were periods when whole spiral arms would be abandoned by one civilization or the other. The Galactic Institute of Migration organized these huge movements for the oxygen breathers, every hundred million years or so. The official reason was to allow great tracts of stars to “go fallow” for an era, to give their planets time to develop new pre-sentient life. Still, the other purpose was widely known… to put space between hydrogen and oxygen life where it seemed impossible to ignore each other any longer.

And now Kault was telling him that there had been a recent negotiation right in the Poul-Kren sector? And humans had been there?

Why have I never heard of this before? he wondered.

He wanted to follow this thread, but had no opportunity. Kault was obviously unwilling to pursue it, and returned to the earlier topic of conversation.

“I still believe there is something anomalous about the Gubru transmissions, Uthacalthing. From their broadcasts itis clear that they are combing both Port Helenia and theislands, seeking out the Earthlings’ ecology and uplift experts.”

Uthacalthing decided that his curiosity could wait — a hard decision for a Tymbrimi. “Well, as I suggested earlier, perhaps the Gubru have decided to do their duty by Garth, at last.”

Kault gurgled in a tone Uthacalthing knew denoted doubt. “Even if that were so, they would require ecologists, but why Uplift specialists? I intuit that something curious is still going on,” Kault concluded. “The Gubru have been extremely agitated for several megaseconds.”

Even without their small receiver, or any news over the airwaves at all, Uthacalthing would still have known that much. It was implicit in the intermittent blue light he had been following since weeks ago. The flickering glow meant that the Tymbrimi Diplomatic Cache had to have been breached. The bait he had left inside the cairn, along with numerous other hints and clues, could only lead a sapient being to one conclusion.