Elmer Ellis dropped the flash and screamed and in mid-scream jerked the gun to his shoulder and fired blindly into the henhouse, first the right barrel, then the left, the shots so close together that they sounded as one explosion.

Then they were coming at him, leaping from the open door, hundreds of them, it seemed, faintly seen in the light of the flash that lay upon the ground — horrible little monsters such as one would never see except in some sweating dream. He reversed the gun, scarcely realizing that he did it, grasping the barrels in both his hands, using it as a club, flailing with it blindly as they came swarming out at him.

Jaws fastened on an ankle and a heavy body struck him in the chest. Claws raked his left leg from hip to knee and he knew that he was going down and that once he was down they would finish him.

He sagged to his knees and now one of them had him by the arm and he tried to fight it off, while another clawed his back to ribbons. He tipped over on one side and ducked down his head, covering it with his one free arm, drawing up his knees to protect his belly.

And that was all. They no longer chewed or ripped him. He jerked up his head and saw them, flitting shadows, moving out into the dark. The beam of the fallen flashlight caught one of them momentarily and for the first time he really saw the sort of creatures that had been in the henhouse and at the sight of it he bawled in utter terror.

Then it was gone — all of them were gone — and he was alone in the yard. He tried to get up. Halfway erect, his legs folded under him and he fell heavily. He crawled toward the house, clawing at the ground to pull himself along. There was a wetness on one arm and one leg, and a stinging pain was beginning in his back.

The kitchen window glowed with a lighted lamp. Tige came out from beneath the porch and crawled toward him, belly flat against the ground, whining. Mary, in her nightgown, was running down the stairs.

"Get the sheriff," he yelled at her, gasping with the effort. "Phone the sheriff!"

She raced across the yard and knelt beside him, trying to get her hands beneath his body to lift him.

He pushed her away. "Get the sheriff! The sheriff has to know."

"But you're hurt. You're bleeding.,"

"I'm all right," he told her fiercely. "They're gone. But the others must be warned. You didn't see them. You don't know."

"I have to get you in. Call the doctor."

"The sheriff first," he said. "Then the doctor,"

She rose and raced back to the house. He tried to crawl, covered a few feet, and then lay still. Tige came crawling out to meet him, edged in close to him, began to lick his face.

30

Once the men were seated around the table in the conference room, Dr. Samuel Ives opened the discussion.

"This meeting," he said, "despite the solemnity of the occasion which brings us together in the dead of night, marks what for all of us of the present must be an exciting event. All of our professional lives most of us have at times puzzled over the fundamental nature of time irreversibility. A couple of us, myself and Dr. Asbury Brooks, have spent a great deal of time in its study. I am of the opinion that Dr. Brooks will not take it badly if I say we have made little, if any, progress in our studies of this fundamental question. While the lay person may question the validity of such study, viewing time as a philosophical rather than a physical concept, the fact remains that the physical laws with which all of us work are embedded in this somewhat mysterious thing that we call time. We must ask ourselves, if we are to completely understand the concepts that we employ, both in our daily lives and our continuing investigations into many areas of science, what may be the physical interrelationships underlying the expansion of the universe, information theory, and the thermodynamic, electromagnetic, biological and statistical arrows of time. In the description of any physical phenomenon, the time variable is a parameter, at the most elementary level. We have wondered if there were such a thing as universal time or whether it may be only a feature of boundary conditions. There are some of us who think that the latter may be the true explanation, that in the universe the time factor was perhaps rather randomly set at the moment of the beginning of the universe and has persisted ever since. And all of us, I think, are aware that our thinking about time must be overwhelmingly prejudiced by our intuitive notions about the direction of time flow and that this may be one of the factors which has made it so difficult for us to understand and formulate any real theories about this thing that we call time."

He looked across the table at the three men from the future. "I must beg your indulgence for this sort of introduction to our discussion, remarks that, in view of what you have learned, may sound somewhat silly. But I did think it important to set out our own views and study into some sort of perspective. But now that I have said this much, I think that it is your turn to talk and I assure you that all of us will listen most attentively. Which one of you would like to begin?"

Hardwicke and Cummings looked at each other questioningly. Finally Hardwicke said "Perhaps I might as well. I must express the deep appreciation all three of us feel for your willingness to meet with us at this unusual hour. And I am afraid that we are about to disappoint you, for I must tell you that we know very little more about the fundamental nature of time than you do. We have asked ourselves some of the same questions you have asked and have found no real answers…"

"But you can travel in time," said Brooks. "That would argue that you must know something of it. You must have at least a basic understanding…"

"What we found," said Hardwicke, "is that we are not the only universe. There are at least two universes coexisting within the same space, but universes so fundamentally different from one another that neither would be ordinarily aware of the other. At the moment I will not go into the manner in which this other universe was detected or what we know of it. It is not, however, a contraterrene universe, so there is, so far as we know, no danger from it. I might add that the first hint of its existence came from a study of the strangeness of certain particles. Not that the particles themselves are a part of this other universe, but because, in certain instances, they can react to certain not-entirely-understood conditions in the other universe. Two totally different universes. The other made up of particles and interactions which have little to do with the particles and interactions of our universe, although, as I have indicated, there can be interactions, but on so small a scale that only blind, dumb luck could bring them to one's notice. Fortunately, researchers experienced that blind luck.

And it was mostly luck, too, that revealed to us something else about the second universe. I often wonder if luck, for want of a better word, might not be a factor that should be in itself the subject of a study with a view to a better determination of its parameters. As I say, we found out one thing else about the other universe, a very simple thing and yet, when one thinks about it, a rather devastating concept. What we found was that the arrow of time in the second universe was flowing in exactly the opposite direction to the one it traveled in our universe. While undoubtedly in that universe it was moving from the universe's past toward its future, in relation to this universe, it was traveling from our future toward our past."

"There is one thing that puzzles me," said Ives. "You were dealing with a very complex matter and yet in twenty years or so…"

"It is not as remarkable as you think," said Cummings. "There was a crash project, certainly, to achieve time travel, but before the project was begun we were in possession of the knowledge that Dr. Hardwicke has outlined. On your old time track the fact of the second universe was discovered somewhat less than a hundred years from now. It had been investigated for almost four centuries before we finally put the time arrow of the second universe to work. As a matter of fact, much significant work had been done on the possibility of using the opposite time direction of the second universe as a time travel medium. All we had to do was give the investigation a final push. I think the method might have been worked out earlier, even before the invasion by the aliens, if there had been any reason for it. But, aside from scientific curiosity, there wasn't. Under ordinary circumstances, there's not much attraction to time travel if you can move in only the one direction and there's no possibility of returning."