All reports were read to the last letter by Probos Five before assembling equipment for his own trip. In the reports he had noted many of the difficulties of the earlier missions. Planet Three was impossible for a Mercurian without a heated space suit. The temperature of Planet Three was so low that it would literally freeze a Mercurian stiff in a matter of seconds.
The casualties of the early expeditions had been numerous. Many Mercurians had succumbed to the bitter cold due to flaws in space suits and other accidents. A break in the suit meant instant death. The victims of such mishaps were invariably buried in the isolated, sparsely inhabited Polar regions to avoid alarming the divided trunk creatures.
It was strange, mused Probos Five, that the divided trunks were seemingly unable to bear the slightest increase in temperature. Their bodies disintegrated upon contact with a Mercurian. Some were roped and dragged from a distance up to the doors of the space ships, but no inhabitant of Planet Three had been closer to Mercury than the air lock of the space cruisers. As the divided trunk people were dragged into the air lock, warm air from the ship would be pumped into the lock to dispel the frigid air of Planet Three. As the warmth of Mercury enveloped the divided trunks they became quite red, began to melt and finally dissolved into a gaseous state, leaving a small pile of ashes and a disagreeable odor in the air lock that sometimes lingered for days.
Probos Five believed he had the solution for these obstacles in the path of scientific study of the divided trunks. He had decided to use guile in place of strength. For this reason he had come alone and in a small space runabout to put his solution to the test. But his solution now could never be tried, he remembered morosely.
In the aft compartment Probos Five had constructed a refrigeration plant. By maintaining a constant degree of frigidity he hoped to deliver a pair of each species of divided trunks to Mercury. He hoped especially to capture a complete set and perhaps a few over to make up for breakage and losses. As to what form of sustenance the divided trunks were accustomed to, he had no idea whatsoever. He had intended to bring samples of earth, vegetation and anything else that may have suggested a source of food for the divided trunks.
The thought too had occurred to him that possibly the divided trunk creatures ate one another. On the possibility of this Probos Five had determined to capture three black ones, three white ones, three yellows, three browns and three reds, and three of any other color that he might find. He rather doubted that more colors or combination of colors existed. All previous expedition reports had mentioned only the five colors. However, Probos Five had determined to keep several eyes open on the off chance that he might find a new and different species.
His refrigerator was modeled along the architectural lines of the dens of the divided trunks. The main room of the refrigerator opened to the outside of the ship by means of a small air lock. A Mercurian size air lock was not needed for the divided trunks, as few had been found to be much over three dergs in height.
Winches and cables to pull the divided trunks into the refrigerator were installed in the refrigerator room itself to avoid burning the divided trunks with hot cables from other parts of the ship.
In addition, Probos Five had cunningly devised a refrigerated trap. This too was designed to simulate the caves of the divided trunk creatures but was smaller. It was constructed with entrances readily seen and exits well hidden. Probos Five had expected great things of his trap. He had conceived the idea after reading the report of a Mercurian expedition that explored the dens of the divided trunks at some place marked "Coney Island." According to the reports the divided trunks showed no hesitancy in entering these types of dens. In fact, the writer of the report gave it as his opinion that the divided ones perhaps played games in these types of caves. It also mentioned that some of the dens were equipped with flat shiny surfaces that cast reflections or images. Probos Five had incorporated the image-making surfaces into his trap design. A pity that all this effort must be wasted, thought Probos as he once more turned to the observation ports to check his remaining distance from the planet's surface. Seeing that his time was short, Probos Five turned all five faces forward in the Mercurian gesture of disdain for death. A moment later came the shock.