"You won't hear them at present. They are mere wild conjectures. But to resume: what do we do next?"
"Go to New Inn and rake over the deceased gentleman's apartments."
Thorndyke smilingly ignored my answer and continued—
"We examine each explanation in turn and see what follows from it; whether it agrees with all the facts and leads to the discovery of new ones, or, on the other hand, disagrees with some facts or leads us to an absurdity. Let us take a simple example.
"Suppose we find scattered over a field a number of largish masses of stone, which are entirely different in character from the rocks found in the neighborhood. The question arises, how did those stones get into that field? Three explanations are proposed. One: that they are the products of former volcanic action; two: that they were brought from a distance by human agency; three: that they were carried thither from some distant country by icebergs. Now each of those explanations involves certain consequences. If the stones are volcanic, then they were once in a state of fusion. But we find that they are unaltered limestone and contain fossils. Then they are not volcanic. If they were borne by icebergs, then they were once part of a glacier and some of them will probably show the flat surfaces with parallel scratches which are found on glacier-borne stones. We examine them and find the
