If he let it go suddenly, the men inside would be almost certain to notice it, so, with the same infinite pains, he reversed his former tactics.
If he let go suddenly he was going to be discovered by the men inside.
mnli hypothesis: If he let go suddenly he was going to be discovered by the men inside. premise: If he let it go suddenly, the men inside would be almost certain to notice it, so, with the same infinite pains, he reversed his former tactics.