urope for a longer time than has
elapsed since the great fire, its effects were "writ in water," so far
as our social state is concerned.

On the other hand, if the noble first President of the Royal Society
could revisit the upper air and once more gladden his eyes with a sight
of the familiar mace, he would find himself in the midst of a material
civilization more different from that of his day, than that of the
seventeenth was from that of the first century. And if Lord Brouncker's
native sagacity had not deserted his ghost, he would need no long
reflection to discover that all these great ships, these railways, these
telegraphs, these factories, these printing-presses, without which the
whole fabric of modern English society would collapse into a mass of
stagnant and starving pauperism,--that all these pillars of our State
are but the ripples, and the bubbles upon the surface of that great
spiritual stream, the springs of which, only, he and his fellows were
privileged to see; and seeing, to recognise as that which it behoved
them above all things to keep pure and undefiled.

It may not be too great a flight of imagination to conceive our noble
'revenant' not forgetful of the great troubles of his own day, and
anxious to know how often London had been burned down since his time,
and how often the plague had carried off its thousands. He would have to
learn that, although London contains tenfold the inflammable matter that
it did in 1666; though, not content with filling our rooms with woodwork
and light draperies, we must needs lead inflammable and explosive gases
into every corner of our streets and houses, we never allow even a
street to burn down. And if he asked how this had come about, we should
have to explain that the improvement of natural knowledge has furnished
us with dozens of machines for throwing water upon fires, any one of
which would have furnished the ingenious Mr. Hooke, the first "curator
and experimenter" of the Royal Society, with ample materials for
discourse before half a dozen meetings of that body; and that, to say
truth, except for the progress of natural knowledge, we should not
have been able to make even the tools by which these machines are
constructed. And, further, it would be necessary to add, that although
severe fires sometimes occur and inflict great damage, the loss is very
generally compensated by societies, the operations of which have been
rendered possible only by the progr