behind the dais, looking down over the clutter of benches and fume cupboards like a dusty mural. The schedules on the left, dating from their first year of work, were packed with detailed entries and minutely labelled arrow sprays, but those on the right thinned out progressively, until a few pencilled scrawls in giant longhand ioops sealed off all but one or two of the ecological corridors. Many of the cardboard screens had sprung off their drawing pins, and hung forwards into the air like the peeling hull-plates of a derelict ship, moored against its terminal pier and covered with gnomic and meaningless graffiti.
Idly tracing a large compass dial with his finger in the dust on the desk-top, Kerans waited for Bodkin to provide some explanation for his curious experiments with Hardman. But Bodkin settled himself comfortably behind the muddle of box-files and catalogue trays on his desk, then opened the record player and removed the disc from the table, spinning it reflectively between his hands.
Kerans began: "I'm sorry I let slip that we were leaving in three days' time. I hadn't realised you'd kept that from Hardman."
Bodkin shrugged, dismissing this as of little importance. "It's a complex situation, Robert. Having gone a few steps towards unravelling it I didn't want to introduce another slip knot."
"But why not tell him?" Kerans pressed, hoping obliquely to absolve himself of his slight feeling of guilt. "Surely the prospect of leaving might well jolt him out of his lethargy?"
Bodkin lowered his glasses to the end of his nose and regarded Kerans quizzically. "It doesn't seem to have had that effect on you, Robert. Unless I'm very much mistaken you look rather un-jolted. Why should Hardman's reactions be any different?"
Kerans smiled. "Touché, Alan. I don't want to interfere, having more or less dropped Hardman into your lap, but what exactly are you and he playing about with—the electric heater and alarm clocks?"
Bodkin slid the gramophone record into a rack of miniature discs the shelf behind him. He looked up at Kerans and for a few moments watched him with the mild but penetrating gaze with which he had observed Hardman, and Kerans realised that their relationship, until now that of colleagues confiding completely in each other, had become closer to that of observer and subject. After a pause Bodkin glanced away at the program charts, and Kerans chuckled involuntarily. To himself he said: Damn the old boy, he's got me up there now with the algae and nautiloids, next he'll be playing his records at me.
Bodkin stood up and pointed to the three rows of laboratory benches, crowded with vivaria and specimen jars, pages from notebooks pinned to the fume hoods above them.
"Tell me, Robert, if you had to sum up the last three years' work in a single conclusion, how would you set about it?"
Kerans hesitated, then gestured off-handedly. "It wouldn't be too difficult." He saw that Bodkin expected a serious answer, and composed his thoughts. 'Well, one could simply say that in response to the rises in temperature, humidity and radiation levels the flora and fauna of this planet are beginning to assume once again the forms they displayed the last time such conditions were present—roughly speaking, the Triassic."
"Correct." Bodkin strolled off among the benches. "During the last three years, Robert, you and I have examined something like five thousand species in the animal kingdom, seen literally tens of thousands of new plant varieties. Everywhere the same pattern has unfolded, countless mutations completely transforming the organisms to adapt them for survival in the new environment. Everywhere there's been the same avalanche backwards into the past—so much so that the few complex organisms which have managed to retain a foothold unchanged on the slope look distinctly anomalous—a handful of amphibians, the birds, and Man . It's a curious thing that although we've carefully catalogued the backward journeys of so