it
consisted of two vaulted passage ways, with a row of piers and arches
between them. One of these passage ways was closed up; the other was
open, and was lighted brilliantly with gas all the way through. But what
most attracted Rollo's attention was, that the spaces between the piers
all along the Tunnel were occupied with little shops, each one having a
man, a woman, or a child to attend it. As Mr. George and Rollo walked
along, those people all asked them to stop and buy something at their
shops. There were pictures of all kinds, and little boxes, and views of
the Tunnel, with magnifying glasses to make them look real, and needle
cases, and work boxes, and knickknacks of all kinds for people to buy
and carry home as souvenirs, or to show to their friends and say that
they bought them in the Tunnel.

[Illustration: SHOPPING IN THE TUNNEL.]

Besides these things that were for sale, there were various objects of
interest and curiosity, such as electric machines where people might
take shocks, and scales where they might be weighed, and refreshment
rooms that were formed in the passage way that was not used for travel;
and in one place there was a little ball room arranged there, where a
party might, if they chose, stop and have a dance.

Rollo and Mr. George walked through the Tunnel, and then came back
again. As they came back, Rollo stopped at one of the shops and bought a
pretty little round box, which he said would do for a wafer box, and
would also serve as a souvenir of his visit to the place.

Mr. George and Rollo concluded, after ascending again to the light of
day, that they would go home by water; so they went out to the end of a
long floating pier, which was built, as it happened, exactly opposite
the entrance to the Tunnel. They sat down on a bench by a little toll
house there, to wait for a steamer going up the river.

"It must have been just about under here," said Rollo, "that I bought my
little wafer box in the Tunnel."

"Yes," said Mr. George; "just about."

In a few minutes a steamer came along and took them in. She immediately
set off again; and, after passing under all the London bridges and
stopping on the way at various landings, she set them down at Hungerford
stairs, and they went to their lodgings.

* * * * *

Mr. George and Rollo had various other adventures in London which there
is not space to describe in this volume. Rollo did not, however, have
tim