'Ever hear anything like that, Earthy?' asked the Martian.
'It isn't anything,' shrieked the senator. 'Nothing at all. We just imagine it. We all are going cra/y.'
The thunder sounded nearer and nearer-clearer and clearer.
'There ain't supposed to be a livin' thing on Ganymede,' said Gramp. 'But there's somethin' out there.
Somethin' alive.'
He felt prickles of fear run up his spine and ruffle the hair at the base of his skull.
A long line of things moved out of the horizon haze and into indistinct vision-a nightmare line of things that shone and glittered in the rays of Jupiter.
'My Lord,' said Gramp, 'what are they?'
He glanced around.
To their left was a deep cut-bank, where erosion of long past ages had scooped out a deep, but narrow depression in the hillside.