We looked at each other significantly, but without saying anything; for we all realised the truth of Merna's statement of the previous evening to the effect that the Martians were able to divine what might be in the mind of another without his having to speak. Not one of us had mentioned smoking before Merna, yet he knew exactly what John had upon his mind and was about to ask him.

I thought it was my turn now to obtain some information, so said to Merna, "There is also something which I am very anxious to ask you about."

"Oh yes, sir," replied he, again smiling; "you are anxious to know whether we really possess an elaborate system of canalisation upon Mars, and I can soon set your mind at rest upon that point. Indeed, it was in order to make arrangements for conducting you to inspect some of the canals that I left you yesterday after parting with the Chief.

"Our seas and other large bodies of water have long ceased to exist, and we are therefore dependent upon the water arising from the dissolving snow of our polar snow-caps for a supply of that prime necessary of life. Our canal system is, therefore, the most supremely important work which we have to maintain and develop, so that every part of the planet may be supplied with water, and also kept in touch with the rest of the planet. You must clearly understand that upon the adequacy and perfect working of the canals all life here is dependent; so every other matter is regarded as of lesser importance."

I may here say that we afterwards learnt that the positions of the higher officials connected with the administration of the canal system are regarded as amongst the highest and most honourable offices that a Martian can aspire to; and, moreover, that Merna himself held a very responsible position in the engineering department connected with the canals.

Merna then went on to say: "You will see for yourselves, presently, what our canals are like; for I am about to take you across to a point where you will have a good view over the country.

"As our canals are such conspicuous features upon our planet, especially where they cross the deserts, our experts have long been endeavouring, by various means, to transmit influences to the earth, in order to direct your people's attention to the regular lines they form, and thus convince them that Mars is inhabited by intelligent beings. Probably it is the case that very few of your scientific men are endowed with intelligences both sufficiently advanced, and sufficiently adaptable and receptive of new ideas, to enable them to assimilate and make use of the influences thus transmitted; but still we know that some must have grasped the situation."

"Merna," I answered, "that is quite true; but, of course, I cannot say whether it has been the result of Martian influences. Thirty years ago one of our great observers saw and mapped many of the canal lines; and years before that, others had seen them imperfectly, and drawn portions of them on their maps. Our first and greatest exponent of the idea that they were really canals was, however, Professor Lowell, an American astronomer, whose fame has spread all over our world. He has not only been a constant observer of Mars for many years, but has mapped out your canal systems from observations made by himself and his colleagues. He has also formulated a reasonable and, as it now appears, true explanation of their object and purpose; as well as demonstrating their existence to be a prime necessity for the well-being of your people.

"It is true he has met with much opposition; not only from those who have but limited knowledge, and refuse to believe anything they cannot see themselves, but from the older school of astronomers, who are not very receptive of new ideas; and who are, perhaps, naturally reluctant to admit the inadequacy or inaccuracy of their early theories. This is a very common failing with experts of all kinds, and we have had many instances of it in connection with astronomy all through our history; but we have amongst us many intelligent persons who are open to conviction, being unfettered in regard to particular theories. They are, therefore, not only willing, but eager to examine the evidence which has been collected, and to form their own opinions on the subject."