"Don't set foot on it; don't--don't, till we're sure." "On--on what ?" Then Jane realised how mad she looked, how insane the whole scene was, and she gave way to her emotions.

Partly through physical exhaustion and breathlessness, and partly through helpless terror, she fell on her knees.
"The bridge!" she said.

"I don't care what happens to me so that no harm comes to you.

There's things being plotted and planned that looks like accidents.

The bridge would look like an accident if part of it broke.
There's no bottom to the water.