And what does Professor Hartley say about it ?" "He says, my dear Niti," said the Professor, in a voice which had something like a note of awe in it, "that when Pythagoras thought out that problem--which, of course, is not Euclid's at all--he almost saw across the horizon of the world that we live in." "But that," she interrupted, "would be something like looking across the edge of time into eternity, and that--well, of course, that is quite impossible, even to you, Dad, or Mr Hartley.

What does he mean ?" "He doesn't quite mean that, dear," replied the Professor, still staring straight at the motionless Mummy as though he half expected the lips which had not spoken for fifty centuries to answer the question that was shaping itself in his mind.

"What Hartley means, dear, is this--that when Pythagoras thought out that proposition he had almost reached the border which divides the world of three dimensions from the world of four." "Which, as our dear old friend Euclid would say, is impossible; because you know, Dad, if that were possible, everything else would be.

Come, now, Annie is bringing up your whisky and soda.

Put away your problems and take your night-cap, and do get to bed in something like respectable time.