Starting up he demanded who was there and what was wanted.
'It is I,' Arthur said.

'I thought I smelled gas, and I have been hunting round for it.

There is nothing worse to breathe than gas, whether from the furnace, the pipes, or the drain.

I hope that is all right.' 'Yes,' Frank answered, a little crossly.

'Had a new one put in two weeks ago.' 'If there's gas in the main sewer it will come up just the same, and I am sure I smell it,' Arthur said.