Analysis of information sources in references of the Wikipedia article "Camille Flammarion" in English language version.
The New York Times reported that the noted French astronomer, Camille Flammarion believed the gas "would impregnate that atmosphere and possibly snuff out all life on the planet".
Prof. Lowell's theory that intelligent beings with constructive talents of a high order exist on the planet Mars has a warm supporter in M. Camille Flammarion, the well-known French astronomer, who was seen in his observatory at Juvisy, near Paris, by a New York Times correspondent. M. Flammarion had just returned from abroad, and was in the act of reading a letter from Prof. Lowell.
The New York Times reported that the noted French astronomer, Camille Flammarion believed the gas "would impregnate that atmosphere and possibly snuff out all life on the planet".