The two men were widely separated from each other at the time, and the sea lay between.
POSTSCRIPT
In the ‘Atlantic’ for June 1882, Mr. John Fiske refers to the often-quoted Darwin-and-Wallace ‘coincidence’:
‘I alluded, just now, to the “unforeseen circumstance” which led Mr. Darwin in 1859 to break his long silence, and to write and publish the “Origin of Species.” This circumstance served, no less than the extraordinary success of his book, to show how ripe the minds of men had become for entertaining such views as those which Mr. Darwin propounded. In 1858 Mr. Wallace, who was then engaged in studying the natural history of the Malay Archipelago, sent to Mr. Darwin (as to the man most likely to understand him) a paper in which he sketched the outlines of a theory identical with that upon which Mr. Darwin had so long been at work. The same sequence of observed facts and inferences that had led Mr. Darwin to the discovery of Natural Selection and its consequences had led Mr. Wallace to the very threshold of the same discovery; but in Mr. Wallace’s mind the theory had by no means been wrought out to the same degree of completeness to which it had been wrought in the mind of Mr. Darwin. In the preface to his charming book on Natural Selection, Mr. Wallace, with rare modesty and candour, acknowledges that whatever value his speculations may have had, they have been utterly surpassed in richness and cogency of proof by those of Mr. Darwin. This is no doubt true, and Mr. Wallace has done such good work in further illustration of the theory that he can well afford to rest content with the second place in the first announcement of it.
‘The coincidence, however, between Mr. Wallace’s conclusions and those of Mr. Darwin was very remarkable. But, after all, coincidences of this sort have not been uncommon in the history of scientific inquiry. Nor is it at all surprising that they should occur now and then, when we remember that a great and pregnant discovery must always be concerned with some question which many of the foremost minds in the world are busy thinking about. It was so with the discovery of the differential calculus, and again with the discovery of the planet Neptune. It was so with the interpretation of the Egyptian hieroglyphics, and with the establishment of the undulatory theory of light. It was so, to a considerable extent, with the introduction of the new chemistry, with the discovery of the mechanical equivalent of heat, and the whole doctrine of the correlation of forces. It was so with the invention of the electric telegraph and with the discovery of spectrum analysis. And it is not at all strange that it should have been so with the doctrine of the origin of species through natural selection.’
He thinks these ‘coincidences’ were apt to happen because the matters from which they sprang were matters which many of the foremost minds in the world were busy thinking about. But perhaps one man in each case did the telegraphing to the others. The aberrations which gave Leverrier the idea that there must be a planet of such and such mass and such and such an orbit hidden from sight out yonder in the remote abysses of space were not new; they had been noticed by astronomers for generations. Then why should it happen to occur to three people, widely separated—Leverrier, Mrs. Somerville, and Adams—to suddenly go to worrying about those aberrations all at the same time, and set themselves to work to find out what caused them, and to measure and weigh an invisible planet, and calculate its orbit, and hunt it down and catch it?—a strange project which nobody but they had ever thought of before. If one astronomer had invented that odd and happy project fifty years before, don’t you think he would have telegraphed it to several others without knowing it?
But now I come to a puzzler. How is it that inanimate objects are able to affect the mind? They seem to do that. However, I wish to throw in a parenthesis first—just a reference to a thing everybody is familiar with—the experience of receiving a clear and particular answer to your telegram before your telegram has reached the sender of the answer. That is a case where your telegram has gone straight from your brain to the man it was meant for, far outstripping the wire’s slow electricity, and it is an exercise of mental telegraphy which is as common as dining. To return to the influence of inanimate things. In the cases of non-professional clairvoyance examined by the Psychical Society the clairvoyant has usually been blindfolded, then some object which has been touched or worn by a person is placed in his hand; the clairvoyant immediately describes that person, and goes on and gives a history of some event with which the text object has been connected. If the inanimate object is able to affect and inform the clairvoyant’s mind, maybe it can do the same when it is working in the interest of mental telegraphy. Once a lady in the West wrote me that her son was coming to New York to remain three weeks, and would pay me a visit if invited, and she gave me his address. I mislaid the letter, and forgot all about the matter till the three weeks were about up. Then a sudden and fiery irruption of remorse burst up in my brain that illuminated all the region round about, and I sat down at once and wrote to the lady and asked for that lost address. But, upon reflection, I judged that the stirring up of my recollection had not been an accident, so I added a postscript to say, never mind, I should get a letter from her son before night. And I did get it; for the letter was already in the town, although not delivered yet. It had influenced me somehow. I have had so many experiences of this sort—a dozen of them at least—that I am nearly persuaded that inanimate objects do not confine their activities to helping the clairvoyant, but do every now and then give the mental telegraphist a lift.
The case of mental telegraphy which I am coming to now comes under I don’t exactly know what head. I clipped it from one of our local papers six or eight years ago. I know the details to be right and true, for the story was told to me in the same form by one of the two persons concerned (a clergyman of Hartford) at the time that the curious thing happened:
‘A Remarkable Coincidence.—Strange coincidences make the most interesting of stories and most curious of studies. Nobody can quite say how they come about, but everybody appreciates the fact when they do come, and it is seldom that any more complete and curious coincidence is recorded of minor importance than the following, which is absolutely true and occurred in this city:
‘At the time of the building of one of the finest residences of Hartford, which is still a very new house, a local firm supplied the wall-paper for certain rooms, contracting both to furnish and to put on the paper. It happened that they did not calculate the size of one room exactly right, and the paper of the design selected for it fell short just half a roll. They asked for delay enough to send on to the manufacturers for what was needed, and were told that there was no especial hurry. It happened that the manufacturers had none on hand, and had destroyed the blocks from which it was printed. They wrote that they had a full list of the dealers to whom they had sold that paper, and that they would write to each of these, and get from some of them a roll. It might involve a delay of a couple of weeks, but they would surely get it.