‘Beautiful shot!’ shouted Jenkins, as she came within hailing distance. ‘A real ripper! One went just ahead and the other right underneath me. That depth you set them at was about right and they ran straight. If I’d been a Hun you’d have blown me to smithereens.’

‘Did you see me?’ howled Raymond.

‘No fear. Never saw a vestige of periscope. In fact, I thought you’d missed me.’

‘That’s good. I nearly broke surface once, and I was afraid it would be no use carrying on. Will you bring the “fish” in and I’ll take ’em from you when we get alongside the Parentis?’

‘Yes, all right. I’m picking them up now. See you later.’

Raymond started the motors and ‘123’ drew ahead. Presently Burton returned with the torpedoes, which were carefully hoisted, and as the boat was swung to the davit-heads the Zero got under weigh. Ahead in a cloud from her exhaust was the submarine, on her gas engines now, and putting her best screw forward for the harbour. Permission to enter was sought and granted from the Flagship in hoists of coloured bunting and the exercise was over.

As the Zero gathered speed the captain looked up from the chart table.

‘This is where we come in, I think,’ he said with a grin; ‘shove her on to full.’

Down below the telegraph clanged and the small craft shook herself like an expectant terrier. Then she began to feel the added impetus and rapidly overhauled her slower rival. The Heads of the harbour entrance opened out as they approached, and the trawler at the gate hoisted the clearance signal. Beyond, the masts and funnels of the Fleet could be seen, and away to the southward an Admiralty collier was punching along with her cargo of diamonds for the ever hungry bunkers.

As they buzzed past their recent enemy, Jenkins gave an order to the signal boy, and that ingenuous youth began waving the semaphore arms with evident enjoyment.