One room of the Chemical Laboratory--in the corner most distant from Administration--was separated from the rest of the building by a sixteen-inch wall of concrete and steel extending from foundation to roof without a door, window, or other opening. This was the laboratory of the Chemical Engineers, the boys who played with explosives high and low; any explosion occurring therein could not affect the Chemical Laboratory proper or its personnel. Entwhistle's main roads were paved; but in February of 1942, such minor items as sidewalks existed only on the blue-prints. Entwhistle's soil contained much clay, and at that time the mud was approximately six inches deep. Hence, since there were neither inside doors nor sidewalks, it was only natural that the technologists did not visit at all frequently the polished-tile cleanliness of the Laboratory. It was also natural enough for the far larger group to refer to the segregated ones as exiles and outcasts; and that some witty chemist applied to that isolated place the name "Siberia." The name stuck. More, the Engineers seized it and acclaimed it. They were Siberians, and proud of it, and Siberians they remained; long after Entwhistle's mud turned into dust. And within the year the Siberians were to become well and favorably known in every ordnance plant in the country, to many high executives who had no idea of how the name originated. Kinnison became a Siberian as enthusiastically as the youngest man there. The term "youngest" is used in its exact sense, for not one of them was a recent graduate. Each had had at least five years of responsible experience, and "Cappy" Sumner kept on building. He hired extravagantly and fired ruthlessly--to the minds of some, senselessly. But he knew what he was doing. He knew explosives, and he knew men. He was not liked, but he was respected. His building was good. Being one of the only two "old" men there--and the other did not stay long--Kinnison, as a Junior Chemical Engineer, was not at first accepted without reserve. Apparently he did not notice that fact, but went quietly about his assigned duties. He was meticulously careful with, but very evidently not in any fear of, the materials with which he worked. He pelleted and tested tracer, igniter, and incendiary compositions; he took his turn at burning out rejects. Whenever asked, he went out on the lines with any one of them. His experimental tetryls always "miked" to size, his TNT melt-pours--introductory to loading forty-millimeter on the Three Line--came out solid, free from checks and cavitations. It became evident to those young but keen minds that he, alone of them all, was on familiar ground. They began to discuss their problems with him. Out of his years of technological experience, and by bringing everyone present into the discussion, he either helped them directly or helped them to help themselves. His stature grew.