"If an observer be blessed with the happy combination of good eyesight, a good instrument, and favourable atmospheric conditions, and publishes writings and drawings showing that he has seen something which has not previously been observed, he at once becomes a target for captious critics who seem to be under the impression that all astronomical knowledge begins and ends with themselves, and that anything they cannot see does not exist. It matters not that the observer attacked may have given months to particular observations where his critics have only spent a few hours: he is told that his drawings are incorrect and do not represent the planet; that they may be works of art, but do not represent facts; that he possesses a very vivid imagination, and so on. This procedure may be persisted in until at last the victim either turns and rends his critics or ceases to publish his drawings or records, to the great loss of many others who take an intelligent interest in his work. "Professor Lowell's telescope is over 32 feet in focal length, and has an object glass of excellent quality 24 inches in diameter, the work of the celebrated Alvan Clark. Thus, whilst not one of the giants, it is not exactly what would be termed a small instrument, and few indeed of the critics have anything approaching it in capacity, while none enjoys the advantage of such ideal conditions in the situation of his observatory. "I was therefore much amused in reading an effusion by one critic who, in discussing the question of the canal lines, remarked that he could not accept 'these one-man discoveries,' oblivious of the fact that they are the discoveries of many observers. He then very naïvely gives the illuminating information that his astronomical experience is confined to the 'observation' of the _moon_ for about six months, by the aid of a 1-1/4-_inch hand-telescope_! Surely, when confronted with a critic of such vast experience and so wonderfully equipped, Professor Lowell must retire discomfited from the field!" At the conclusion of my remarks both John and M'Allister expressed their thanks, saying that "Now they were informed as to the points on which our scientists were not agreed, they would look forward with still greater interest to our arrival at our destination, for they were as anxious as I was to solve the mysteries of the red planet." CHAPTER XII WE ARE MYSTERIOUSLY PREVENTED FROM APPROACHING MARS The days then passed uneventfully until at last the long-looked-for day arrived, and on the 24th September we were so close to Mars that we hoped to be able to land on the planet by two o'clock in the afternoon. We made ourselves a little sprucer than usual, as we wished to do credit to our own world; and M'Allister wore his overalls to protect his clothes, although our machinery was not nearly so messy to handle as steam-engines usually are.