He has resumed his manipulations without realizing that he is not alone.
There is only one means of preventing the imminent catastrophe.

Throw myself upon Roch, place him beyond the power of doing harm--strike him--kill him--yes, kill him! It is my right--it is my duty! I have no arms, but on a near-by shelf I see some tools--a chisel and a hammer.

What is to prevent me from knocking his brains out?
Once he is dead I have but to smash the phials and his invention dies with him.

The warships can approach, land their men upon the island, demolish Back Cup with their shells.

Ker Karraje and his band will be killed to a man.