Most of the barges had derrick masts, and all these masts were moving.
Where the derrick had stood was the mouth of the twenty-inch casing.
The cable that ran from it was entangled with the wreckage of the derrick, but it had not been cut.
And there, where the derrick had stood, was a tall plume of white.
Wisbech said he wished to see Derrick Nasmyth, and the man nodded.