“I wonder at your father’s son,” cried Alan, sternly. “Would ye sell the lad with a gift? Would ye change his clothes and then betray him?”

“No, no, Alan,” said James. “No, no: the habit he took off — the habit Mungo saw him in.” But I thought he seemed crestfallen; indeed, he was clutching at every straw, and all the time, I dare say, saw the faces of his hereditary foes on the bench, and in the jury–box, and the gallows in the background.

“Well, sir” says Alan, turning to me, “what say ye to, that? Ye are here under the safeguard of my honour; and it’s my part to see nothing done but what shall please you.”

“I have but one word to say,” said I; “for to all this dispute I am a perfect stranger. But the plain common–sense is to set the blame where it belongs, and that is on the man who fired the shot. Paper him, as ye call it, set the hunt on him; and let honest, innocent folk show their faces in safety.” But at this both Alan and James cried out in horror; bidding me hold my tongue, for that was not to be thought of; and asking me what the Camerons would think? (which confirmed me, it must have have been a Cameron from Mamore that did the act) and if I did not see that the lad might be caught? “Ye havenae surely thought of that?” said they, with such innocent earnestness, that my hands dropped at my side and I despaired of argument.

“Very well, then,” said I, “paper me, if you please, paper Alan, paper King George! We’re all three innocent, and that seems to be what’s wanted. But at least, sir,” said I to James, recovering from my little fit of annoyance, “I am Alan’s friend, and if I can be helpful to friends of his, I will not stumble at the risk.”

I thought it best to put a fair face on my consent, for I saw Alan troubled; and, besides (thinks I to myself), as soon as my back is turned, they will paper me, as they call it, whether I consent or not. But in this I saw I was wrong; for I had no sooner said the words, than Mrs. Stewart leaped out of her chair, came running over to us, and wept first upon my neck and then on Alan’s, blessing God for our goodness to her family.

“As for you, Alan, it was no more than your bounden duty,” she said. “But for this lad that has come here and seen us at our worst, and seen the goodman fleeching like a suitor, him that by rights should give his commands like any king — as for you, my lad,” she says, “my heart is wae not to have your name, but I have your face; and as long as my heart beats under my bosom, I will keep it, and think of it, and bless it.” And with that she kissed me, and burst once more into such sobbing, that I stood abashed.

“Hoot, hoot,” said Alan, looking mighty silly. “The day comes unco soon in this month of July; and to–morrow there’ll be a fine to–do in Appin, a fine riding of dragoons, and crying of ‘Cruachan!’[24] and running of red–coats; and it behoves you and me to the sooner be gone.”

[24] The rallying–word of the Campbells.

‘I have not,’ said the Provincial Mayor.

‘It is simply this. That Space, as our mathematicians have it, is spoken of as having three dimensions, which one may call Length, Breadth, and Thickness, and is always definable by reference to three planes, each at right angles to the others. But some philosophical people have been asking why THREE dimensions particularly—why not another direction at right angles to the other three?—and have even tried to construct a Four-Dimension geometry. Professor Simon Newcomb was expounding this to the New York Mathematical Society only a month or so ago. You know how on a flat surface, which has only two dimensions, we can represent a figure of a three-dimensional solid, and similarly they think that by models of thee dimensions they could represent one of four—if they could master the perspective of the thing. See?’

‘I think so,’ murmured the Provincial Mayor; and, knitting his brows, he lapsed into an introspective state, his lips moving as one who repeats mystic words. ‘Yes, I think I see it now,’ he said after some time, brightening in a quite transitory manner.

‘Well, I do not mind telling you I have been at work upon this geometry of Four Dimensions for some time. Some of my results are curious. For instance, here is a portrait of a man at eight years old, another at fifteen, another at seventeen, another at twenty-three, and so on. All these are evidently sections, as it were, Three-Dimensional representations of his Four-Dimensioned being, which is a fixed and unalterable thing.

‘Scientific people,’ proceeded the Time Traveller, after the pause required for the proper assimilation of this, ‘know very well that Time is only a kind of Space. Here is a popular scientific diagram, a weather record. This line I trace with my finger shows the movement of the barometer. Yesterday it was so high, yesterday night it fell, then this morning it rose again, and so gently upward to here. Surely the mercury did not trace this line in any of the dimensions of Space generally recognized? But certainly it traced such a line, and that line, therefore, we must conclude was along the Time-Dimension.’

‘But,’ said the Medical Man, staring hard at a coal in the fire, ‘if Time is really only a fourth dimension of Space, why is it, and why has it always been, regarded as something different? And why cannot we move in Time as we move about in the other dimensions of Space?’

The Time Traveller smiled. ‘Are you sure we can move freely in Space? Right and left we can go, backward and forward freely enough, and men always have done so. I admit we move freely in two dimensions. But how about up and down? Gravitation limits us there.’

‘Not exactly,’ said the Medical Man. ‘There are balloons.’

‘But before the balloons, save for spasmodic jumping and the inequalities of the surface, man had no freedom of vertical movement.’ ‘Still they could move a little up and down,’ said the Medical Man.