“The nearer planets of our own solar system have been naturally the objects of our close scrutiny. As our telescopes increased in power we diligently studied the surface of these globes, searching for signs of life. We mapped out their features, noted the various phenomena of season and climate, and discovered many ways in which they seemed to be like our world. But for a long time we found no direct evidence that they were inhabited. “At length, however, one ardent philosopher, full of hope, as we all were, that we had neighbors on some of these globes, brought out the idea that if these neighbors were as far advanced in astronomical science as we were, there ought to be some means of communication between one world and another. The thought took at once, and occasioned the most lively interest. We had no doubt, from what we had learned of these planets, that they were fitted to be, at some time, the home of intelligent beings. Our question was whether the inhabitable period of either of them coincided with that of Mars, and, if so, whether the race was sufficiently developed to be able to see us as well as we could see them. “The first means suggested to attract the attention of such a race of beings was fire. You can imagine that we could get together material enough to make a pretty big blaze, and we did. We lighted immense fires in various places and kept them burning a long time, but without accomplishing anything. We scanned minutely the surface of each planet, but saw no sign anywhere that our effort at communication was recognized. “Disappointed, but not discouraged, we determined next to try a system of simple hieroglyphics by throwing up huge mounds on one of our plains. We thought, if other eyes were studying Mars as closely as we were searching the surface of our sister planets for signs of life, that they would notice any unusual change in our appearance. Then if they did notice it we hoped some means would be found to let us know it. “It was decided to try first the figure of the circle, because we knew that the form of all heavenly bodies must be the most familiar to intelligent life wherever it existed. It took years of labor to construct the mound, for it was thought best to have it large enough to give the experiment a thorough trial. And now you may believe we considered ourselves well repaid for all our toil and expense when, soon after the circle was completed, our telescopes showed us a similar form actually growing upon the surface of both Saturn and Uranus. We immediately replied by beginning the construction of a square, and before this was finished both planets began to answer, one with the triangle and the other with the crescent. The latter was made by Uranus, and as soon as it was finished the triangle began to appear beside it, showing to us that Uranus was reading from Saturn also.