The article in question did not pretend to solve the mystery, but Collocated the facts so as to put the case in a nutshell.
"The Secret Passage"
Fergus Hume
Or, to put it in other words, though certain causes, Collocated in the proper way, would, on this view of evolution, explain everything which ensued from that collocation, we should still want to know why the causes were Collocated in that particular way rather than in any other.
"Evolution"
Frank B. Jevons