Meanings of perilous bridge in English

Retracing once more our steps over this perilous bridge of ultimate thought, we may thus indicate the situation.

But it was a perilous bridge, and Katherine knew it; only there was no other way, so the peril had to be faced.

The perilous bridge they traversed rolled beneath their feet; but they had joined the other men before they came to any particularly troublesome opening.

"Yes," said the boy, stooping now and touching the perilous bridge which had carried him to the comparative safety of the clump of rushes.