for the public prints:
… I am therefore strongly inclined to accept the theory advanced by Schiaparelli in 1882, in which he concluded that Mercury rotates on its axis once in eighty‑eight days. Now, since the sidereal revolution of Mercury, i.e., its complete revolution around the sun, occupies only slightly under eighty‑eight days, the planet always presents the same face to the sun. On that side reigns perpetual day; on the other—the side presented to the earth as Mercury passes us—perpetual night.
The existence of an atmospheric envelope on Mercury, to temper the extremes of heat and cold that would otherwise exist on its light and dark hemispheres, seems fairly certain. If there were no atmosphere on the planet, temperatures on that face toward the sun would be extraordinarily high—many hundred degrees hotter than the boiling point of water.
Quite the other extreme would be the conditions on the dark side, for without the sheltering blanket of an atmosphere, this surface must be exposed to the intense cold of interplanetary space.
I have reason to believe, however, particularly from my deductions made in connection with the photographs taken during the transit of Mercury over the face of the sun on November 11 last, that there does exist an atmosphere on this planet—an atmosphere that appears to be denser and more cloudy than our own. I am led to this conclusion by other evidence that has long been fairly generally accepted as fact. The terminating edge of the phases of Mercury is not sharp, but diffuse and shaded—there is here an atmospheric penumbra. The spectroscope also shows lines of absorption, which proves that Mercury has a gaseous envelope thicker than ours.
This atmosphere, whatever may be its nature I do not assume, tempers the heat and cold on Mercury to a degree comparable to the earth. But I do believe that it makes the planet—on its dark face particularly—capable of supporting intelligent life of some form.
Mercury was in transit over the face of the sun on November 11, of last year, within a few hours of the time the first meteor fell to earth. The planet was therefore at one of her closest points to the earth, and—this is significant—was presenting her dark face toward us.
At this time several new "stars" were reported, flashing into brilliancy and then fading again into obscurity. All were observed in the vicinity of Mercury; none appeared elsewhere. I believe these so‑called "stars" to be some form of interplanetary vehicle—probably navigated in space by beings from Mercury. And from them were launched the two meteors that struck our planet. How many others were dispatched that may have missed their mark we have no means of determining.
The days around November 11 last, owing to the proximity of Mercury to the earth, were most favorable for such a bombardment. A similar time is now once more almost upon us!
Because of the difference in the velocities of Mercury and the earth in their revolutions around the sun, one synodic revolution of Mercury, i.e., from one inferior conjunction to the next, requires nearly one hundred and sixteen days. In eighty‑eight days Mercury has completed her sidereal revolution, but during that time the earth has moved ahead a distance requiring twenty‑eight days more before she can be overtaken.
After the first week in March of this year therefore Mercury will again be approaching inferior conjunction, and again will pass at her closest point to the earth.
We may expect at this time another bombardment of a severity that may cause tremendous destruction, or destroy entirely life on this planet!
CHAPTER II.
THE UNKNOWN ENEMY.
When, in February, 1941, Professor James Newland issued this remarkable statement, my paper sent me at once to interview him. He was at this time at the head of the Harvard observatory staff. He lived with his son and daughter in Cambridge. His wife was dead. I had been acquainted with the professor and his family for some time. I first met his son, Alan, during our university days at Harvard. We liked each other at once, and became firm friends—possibly because we were such opposite physical types, as sometimes happens.
Alan was tall, lean and muscular—an inch or so over six feet—with the perfect build of an athlete. I am dark; Alan was blond, with short, curly hair, and blue eyes. His features were strong and regular. He was, in fact, one of the handsomest men I have ever seen. And yet he acted as though he didn't know it—or if he did, as though he considered it a handicap. I think what saved him was his ingenious, ready smile, and his retiring, unassuming—almost diffident—manner.
At the time of the events I am describing Alan was twenty‑two—about two years younger than I. It was his first year out of college. He had taken a scientific course and intended to join his father's staff.
Beth and Alan were twins. I was tremendously interested in Beth even then. She seemed one of the most worth‑while girls I had ever met. She was a little wisp of femininity, slender and delicate, hardly more than five feet one or two. She had beautiful golden hair and an animated, pretty face, with a pert little snub nose. She was a graduate of Vassar, and planned to take up chemistry as a profession, for she had the same scientific bent as her father and brother.
I called upon Professor Newland the evening of the day his statement was published, and found all three discussing it.
"You want me to talk for publication, don't you, Bob Trevor?" the professor asked suddenly, after we had exchanged a few pleasantries.
He was a wiry little man, about sixty, smooth‑shaven, with sparse gray hair, a rugged face of strong character, and a restless air of energy about him. He was an indefatigable worker; indeed, I am confident that, for any single continuous period of work without sleep, he could have run Alan and me into the ground and still have been comparatively fresh.
"You want an exclusive follow‑up story from me to‑night, don't you?" he repeated.
I admitted that I did.
"What you'll get won't be just what you expect. Look at this."
He pulled one of the evening papers toward him vigorously. "They think it is humorous. There—read that."
The item to which he pointed was a sprightly account of the weird beings that might shortly arrive from Mercury.
"They think it's a joke—some of them. There's another—read that."
The attitude of the press was distinctly an inclination to treat the affair from the humorous side. I had seen indications of that during the day at the office.
"Look here, Bob"—the professor swept all the papers aside with his hand. "You put it to them this way. Make them see this is not a prediction of the end of the world. We've had those before—nobody pays any attention to them, and rightly so. But this Mercutian Light is more than a theory—it's a fact. We fought it last November, and we'll have to fight it again next month. That's what I want to make them realize."
"They'll think it is worth being serious about," Alan put in, "if one of those lights drop into Boston or New York—especially if it happens to play in a horizontal direction instead of vertical."
We went into the whole subject thoroughly, and the professor gave me a second signed statement in which he called upon the nations of the world to prepare for the coming peril.
The actual characteristics of the Mercutian Light we had discussed before several times. A good deal had been printed about it during the previous December—without, as I have said, attracting much public attention. The two meteors had been examined. They were found to be of a mineral that could have originated on Mercury. They were burned and pitted like other meteorites by their passage through the earth's atmosphere.
Of the light itself Professor Newland had already given his opinion. It was, he said, some unknown form of etheric vibration. It radiated heat very slightly, but it had the peculiarity of generating intense heat in anything it touched directly.