One thing I'd done already as a precaution ripped open the oilskin packet and substituted blank paper, and then sewn it up again.
I had changed the paper in the oilskin packet.
mnli hypothesis: I had changed the paper in the oilskin packet. premise: One thing I'd done already as a precaution ripped open the oilskin packet and substituted blank paper, and then sewn it up again.