out of the tunnel by using sandbags. Then they planted
enough dynamite to blow up a large part of the German force. The
two trench lines were very close together on this part of the front;
and, to prevent accidents, the British left their trenches near
the mine before it was fired.

On the night of June 6, 1915, the mine tore open the trenches of
both sides, and buried one of the British magazines which was filled
with hand grenades and killed several British bomb throwers. At about
the same moment another supply of British bombs was exploded when
it was struck by a shell from a German howitzer. This occurred at
a place on the line called Duck's Bill, and resulted in the British
being without an adequate supply of hand grenades. The British troops
in this action were the soldiers of a British division and a Canadian
brigade. The latter included the First Ontario Regiment, the Second
and Fourth Canadian Battalions, the Third Toronto Regiment, and
the East Yorkshires.

The Ontario regiment was directed against a fortified part of the
German line which was called Stony Mountain. To the south of Stony
Mountain, about 150 yards, was another fortified position called
Dorchester. This also was to be taken by the Ontario men. If they
succeeded in their work the right flank of the British division
would be protected. But it was Stony Mountain that was of most
importance to the British. Its machine guns and its northern defenses
menaced the route which the British must take to make an advance. In
order to prevent the Germans from giving their undivided attention
to the Canadians, the British division on the left made an advance
against the Teutons north of Stony Mountain. The British artillery
had been shelling this part of the German line day and night many
days as a preparation for this advance. Its projectiles crashed
into the brick fields near La Bassee, and in front of the wrecked
village of Quinchy.

The German machine-gun crews were hidden behind the brick stacks
which were square blocks of burned clay upon which the British
shells burst without perceptible effect. The shells that went over
the stacks, however, did much damage. Beyond the brick field to
the north were the ruins of farm buildings which were also hiding
places for the Germans and their machine guns. All the buildings
back of the German line had been turned into fortresses whose
underground works were concreted and connected with their headquarters
by t