The sub assented, and Captain Restronguet led the way for'ard to the divers' dressing-room. On the way he stopped, and asked his companion to accompany him to the after-conning-tower.
The sun was now shining brightly, and even at that depth the luminosity was sufficient to enable the interior of the conning-tower to be seen without the aid of artificial light.
"It is now nine o'clock," remarked Captain Restronguet. "On what quarter ought the sun to be visible at this hour?"
"South-east," replied Hythe promptly.
"Now look at its bearing according to our standard compass."
"Why, it bears south-west."
"Exactly. Now that explains the loss of 'La Flamme.' Practically the whole of this coast contains vast quantities of iron ore, and the deviation of the compass at this particular spot amounts to as much as ninety degrees. The north-west coast of Spain is bad enough in this respect. You may have heard of the loss of the 'Serpent,' several years ago. That was attributed to magnetic influence of the iron ore upon the ship's compass. Here the error is still greater. It is easy to understand that the unfortunate submarine, getting within the fatal influence of the magnetic attraction, ran full tilt upon the rocks in a heavy sea and on a pitch-dark night. But we will now prepare for our submarine walk."
In the dressing-room were Kenwyn, Carnon the quartermaster, and O'Shaunessey, who were also to form the party. The Irishman was somewhat doubtfully examining the dress and helmet served out to him. Anything that was not "regulation" he regarded with suspicion.
"Buck up, O'Shaunessey!" said the quartermaster. "Here's the cap'n; and you're not ready yet."
"Sure, I'm ready," replied the Irishman. "But can't I have me own dress?"