It next becomes necessary to describe the persons engaged in pursuing the experiments by which the art of freezing animals alive is to be attained. "The gentlemen engaged in this enterprise are Signor Rotura, whose researches into the botany and natural history of South America have rendered his name eminent; and Mr. James Grant, a pupil of the late Mr. Nicolle, so long associated with Mr. Thomas Mort in his freezing process. Next to the late Mr. Nicolle, Mr. James Grant can claim pre-eminence of knowledge in the science of generating cold, and his freezing chamber at Woolhara has long been known as the seat of valuable experiments originated in his, Mr. Nicolle's, lifetime." Is it merely an accident, by the way, or is it due to the circumstance that exceptional powers of invention in general matters are often found in company with singular poverty of invention as to details, that two of the names here mentioned closely resemble names connected with the Lunar Hoax? It was Nicollet who in reality devised the Lunar Hoax, though Richard Alton Locke, the reputed author, probably gave to the story its final form; and, again, the story purported to come from Dr. Grant, of Glasgow. In the earlier narrative, again, as in the later, due care was taken to impress readers with the belief that those who had made the discovery, or taken part in the work, were worthy of all confidence. Sir W. Herschel was the inventor of the optical device by which the inhabitants of the moon were to be rendered visible, a plan which "evinced the most profound research in optical science, and the most dexterous ingenuity in mechanical contrivance. But his son, Sir John Herschel, nursed and cradled in the observatory, and a practical astronomer from his boyhood, determined upon testing it at whatever cost." Among his companions he had "Dr. Andrew Grant, Lieutenant Drummond of the Royal Engineers, and a large party of the best English mechanics."