'Yes, sir.'

The captain glowered. 'I believe you're a zealous officer, Mr FitzJohnson,' he said grimly; 'otherwise I should believe that you were treating me with unseemly levity.'

'I'm afraid I don't understand what you mean, sir.'

'You don't understand—eh? Well, next time you report a Zeppelin, kindly make quite certain that it is a Zeppelin. This time you've dragged us all out of our beds to look at a couple of rather bright stars.'

'Stars, sir! But I saw the shape behind the lights!'

The captain shook his head. 'Merely a cloud,' he explained. 'If you look at your so-called lights now, you'll see they haven't moved a fraction of an inch since you first saw them. The nearer clouds travelling across them gave you the impression that they were moving. One of 'em does look rather like a green light, I'll admit, but that's merely the dampness in the air.'

'I'm awfully sorry, sir,' FitzJohnson stammered, covered with confusion. 'I had no idea'——

'Of course you hadn't,' Captain Spencer interrupted. 'Nobody realises he's made a fool of himself until afterwards. However,' he added with a chuckle of amusement, 'I'm not really angry; but nobody, except perhaps the Astronomer-Royal, likes being dragged out of bed to look at celestial bodies. Good-night.'

'Good-night, sir,' said the culprit sheepishly.

The captain and the commander left the bridge together. They both seemed amused.