

Presently Tom found himself once more the chief figure in a wonderful
floating pageant on the Thames; for by ancient custom the ‘recognition
procession’ through London must start from the Tower, and he was bound
thither.

When he arrived there, the sides of the venerable fortress seemed
suddenly rent in a thousand places, and from every rent leaped a
red tongue of flame and a white gush of smoke; a deafening explosion
followed, which drowned the shoutings of the multitude, and made the
ground tremble; the flame-jets, the smoke, and the explosions, were
repeated over and over again with marvellous celerity, so that in a few
moments the old Tower disappeared in the vast fog of its own smoke, all
but the very top of the tall pile called the White Tower; this, with
its banners, stood out above the dense bank of vapour as a mountain-peak
projects above a cloud-rack.