Visible crew/equipment: When the Nautilus starts exploding after the record is played, there is a shot of things being thrown about in the chamber, and you can see the cables used to pull all the furniture to the left. (01:09:45)
Visible crew/equipment: When Hyde is first brought aboard the Nautilus, he is loosely chained, but still tossing crewmen about. There is one crewman, whose back is toward the audience, whose striped shirt puckers around the harness as he is jerked backwards. (00:36:00)
Visible crew/equipment: In the shot where Quatermain shoots at three of the attackers they are attached to wires you see running across the floor, probably needed to trigger off the sparks from their steel armor. (00:09:00)
Answer: I haven't read this book of Wilde, but I think alterations were prompted not by copyright issues but because this conveniences the "league" storyline.