This one makes oars, and that one cordage twists,
Another mends the mainsail and the mizzen;
Thus, not by fire, but by the art divine,
Was boiling down below there a dense pitch
Which upon every side the bank belimed.
I saw it, but I did not see within it
Aught but the bubbles that the boiling raised,
And all swell up and resubside compressed.
The while below there fixedly I gazed,
My Leader, crying out: ‘Beware, beware!’