While I was glancing at the Times newspaper in a morning train for London my eyes fell on the following item:-A STRANGE LIGHT ON MARS.-On Monday afternoon, Dr. Krueger, who is in charge of the central bureau at Kiel, telegraphed to his correspondents:-"Projection lumineuse dans région australe du terminateur de Mars observée par Javelle 28 courant, 16 heures.-Perrotin."In plain English, at 4 a.m., a ray of light had been observed on the disc of the planet Mars in or near the "terminator"; that is to say, the zone of twilight separating day from night. The news was doubly interesting to me, because a singular dream of "Sunrise in the Moon" had quickened my imagination as to the wonders of the universe beyond our little globe, and because of a never-to-be-forgotten experience of mine with an aged astronomer several years ago.This extraordinary man, living the life of a recluse in his own observatory, which was situated in a lonely part of the country, had, or at any rate, believed that he had, opened up a communication with the inhabitants of Mars, by means of powerful electric lights, flashing in the manner of a signal-lantern or heliograph. I had set him down as a monomaniac; but who knows? perhaps he was not so crazy after all.