Ibi-sin loosened the simple fastening on the other two, but didn't open them.

It had been a long time, but he hadn't forgotten everything he knew, and he easily snapped open the simple fastening.

These were closed by doors of a different description from the first, having a simple fastening, and no opening through them.

The assassin or assassins had entered by the scullery door, the simple fastening of which, a hook and staple, had been broken.