The blaze of lights which Sardon switched on in his laboratory wiped the dim silvery gloom out of their eyes in a crash of harsh glaring illumination. In contrast with the tasteful furnishings of the house, the cold white walls and bare tiled floor struck the Saint's sensitive vision with the hygienic and inhuman chill which such places always gave him. But Sardon's laboratory was not like any other place of that kind in which he had ever been.
Ranged along the walls were rows of big glass-fronted boxes, in which apparently formless heaps of litter and rubble could be dimly made out. His tye was caught by a movement in one of the boxes, and he stepped up to look at it more closely. Almost in the same moment he stopped, and nearly recoiled from it, as he realized that he was looking at the largest ant that he had ever seen. It was fully six inches long; and, magnified in that proportion, he could see every joint in its shiny armour-plated surface and the curious bifurcated claws at the ends of its legs. It stood there with its antennae waving gently, watching him with its bulging beady eyes…
"Tetramorium cespitum," said Dr. Sardon, standing beside him. "One of my early experiments. Its natural size is about three tenths of an inch, but it did not respond very well to treatment."
"I should say it had responded heroically," said the Saint. "You don't mean you can do better than that?"
Sardon smiled.
"It was one of my early experiments," he repeated. "I was then merely trying to improve on the work of Ludwig and Ries of Berne, who were breeding giant insects almost comparable with that one, many years ago, with the aid of red light. Subsequently I discovered another principle of growth which they had overlooked, and I also found that an artificial selective cross-breeding between different species not only improved the potential size but also increased the intelligence. For instance, here is one of my later results — a combination of Oecophylla smaragdina and Prenolepsis imparis."
He went to one of the longer and larger boxes at the end of the room. At first Simon could see nothing but a great mound of twigs and leaves piled high in one corner. There were two or three bones, stripped bare and white, lying on the sandy floor of the box… Then Sardon tapped on the glass, and Simon saw with a sudden thrill of horror that what had been a dark hole in the mound of leaves was no longer black and empty. There was a head peering out of the shadow — dark bronze-green, iridescent, covered with short sparse bristly hairs…
"Oecophylla is, of course, one of the more advanced species," Sardon was saying, in his calm precise manner. "It is the only known creature other than man to use a tool. The larvae secrete a substance similar to silk, with which the ants weave leaves together to make their nests, holding the larvae in their jaws and using them as shuttles. I don't yet know whether my hybrid has inherited that instinct."
"It looks as if it would make a charming pet, anyway," murmured the Saint thoughtfully. "Sort of improved lap dog, isn't it?"
The faint sly smile stayed fixed on Sardon's thin lips. He took two steps further, to a wide sliding door that took up most of the wall at the end of the laboratory, and looked back at them sidelong.