I had been used to going through a manhole in a battleship turret, but not through one into a field-gun position before aeroplanes played a part in war.

Manhole of locomotives.

The ray travelled down a moraine of broken coal, so broad at the base that it covered the whole cellar floor, but narrowing upwards and towards the manhole through which the daylight shone.

As Tilda hobbled towards him he hoisted the full bucket on his shoulders, staggered across the towpath with it, and shot its contents into a manhole under the brick wall.