'Any one can have this steel box for me,' retorted Roy. 'I like to fight where I can see what's coming.'

'Maybe you'll see more'n you want before you're finished with this trip, ye long grouser,' put in Williams. 'This ain't no pleasure picnic, let me tell you. Our old man's hot stuff, he is, and if I knows anything about it, it won't be long before he starts handing out surprise packets to them Turks.'

'Hallo,' he broke off, 'we're for the surface.'

As he spoke, G 2's bow began to rise and the whole long hull took a gentle slope.

'Pretty quick!' exclaimed Ken. 'I thought you had to do a lot of pumping first.'

'Bless you, no,' said Williams with a superior grin. 'Not with these 'ere modern craft. They works with horizontal rudders, sort o' fins along the side. Blime, G 2 can pop up and down mighty nigh as quick as a dab chick.'

'There now,' he continued, as the vessel came back to an even keel. 'She's floating just submerged. I reckon her periscopes is just out o' the water.'

'Could we have a look?' asked Ken eagerly.

'Ay, I dare say. You wait a minute and I'll see.'

He was back in a minute, and beckoned them to come.